Table 3.
Details of 181 included studies (alphabetical order of the first author’s name)
| First author | Serial no. | Factors affecting or relating to satisfaction | Measuring method for satisfaction | Year | Country | Type of study | Assessment timing | Number of TKRs | Men | Women | Age | BMI | Primary diagnosis | Surgical approach | Patellar resurface | Prosthesis | Use of cement | Anaesthesia |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adam | 1 | No difference between age 75 years or older and younger than 75 years | British Orthopaedic Association grading system | 1994 | UK | Cohort | Minimum 2 years | 125 | 18 | 67 |
78 G1 64 G2 |
NA | OA | NA | NA | NA | NA | NA |
| Albayrak | 2 | Patient satisfaction was higher in patients with low pain intensity | 4 grades (very satisfied, satisfied, dissatisfied, very dissatisfied) | 2016 | Turkey | Cross-sectional | 22.8 months | 274 | NA | NA | 66.8 | 32.3 | OA | MPP | NA | NA | Yes | Spinal or combined (spinal + epidural) |
| Ali | 3 |
(1) Very satisfied group had less pain, less anxiety or depression (2) Mean range of motion was 11 degrees greater in very satisfied group than the dissatisfied group |
4 grades (very satisfied, satisfied, uncertain, dissatisfied) | 2014 | Sweden | Cross-sectional | 10.5 years | 118 | 32 | 82 | 78.5 | 31.0 | OA | NA | NA | NA | NA | NA |
| Ali | 4 | No difference between patellar resurface group and non-resurface group | 4 grades (very satisfied, satisfied, uncertain, dissatisfied) | 2016 | Sweden | Randomised controlled trial | 6 years | 74 | 29 | 45 | 68.5 | 30.0 | OA | MPP | Yes and no | Triathlon (CR) | Yes | 62 spinal, 12 general |
| Ali | 5 |
(1) Patients with pre-operative anxiety or depression had more than 6 times higher risk to be dissatisfied compared with patients with no anxiety or depression (P < 0.001) (2) Patients with deep prosthetic infection had 3 times higher risk to be dissatisfied with the operation outcome (P < 0.03) (3) Dissatisfied patients had 1-day longer hospital stay compared with the satisfied patients (P < 0.001) |
4 grades (very satisfied, satisfied, uncertain, dissatisfied) | 2016 | Sweden | Cohort | 4 years | 186 | 66 | 120 | 72.5 | 30.0 | OA | MPP | NA | Triathlon (CR), PFC (CR) | NA | 87% spinal, 13% general |
| Altay | 6 | No difference between midvastus approach and MPP | 6 grades | 2011 | Turkey | Cohort | 41.3 months | 104 | 14 | 38 | 67.8 | 31.2 | NA | MPP, midvastus | NA | Maxim (fixed bearing) (PS) | NA | Spinal |
| Anderson | 7 |
(1) Poor mental health score, decreased physical function and increased bodily pain score negatively related to satisfaction (2) Age, gender, diagnosis, weight and pre-operative medical comorbidities did not relate to satisfaction |
5 grades (very satisfied, somewhat satisfied, neutral, somewhat dissatisfied, very dissatisfied) | 1996 | USA | Cohort | 2.85 years | 119 | 33 | 86 | 79.6 | NA | OA, RA | NA | NA | NA | NA | NA |
| Aunan | 8 | No difference between patellar resurfacing and non-resurfacing | VAS (0–100) | 2016 | Norway | Randomised controlled trial | 3 years | 129 | 48 | 67 | 70.0 | 29.5 | OA | MPP | Yes and no | NexGen (fixed bearing) (CR) | Yes | NA |
| Baker | 9 |
(1) Pain, women gender, OA, age younger than 65 and ASA 1 negatively related to satisfaction (2) Grade of the surgeon (consultant or not), site of the incision, use of a tourniquet and removal of the fat pad did not relate to satisfaction |
3 grades (yes (satisfied), not sure, no) | 2007 | UK | Cross-sectional | Minimum 1 year | 8231 | 3557 | 4671 | 70.8 | NA | OA, other | NA | NA | NA | NA | NA |
| Baker | 10 | Patients with BMI > 35 were less satisfied than the control group (18.5 < BMI < 24) | 4 grades (very satisfied, somewhat satisfied, somewhat dissatisfied, very dissatisfied) | 2013 | UK | Cohort | 3 years | 1367 | 585 | 782 | 68.8 | 29.5 | OA | NA | NA | PFC, triathlon | Yes | NA |
| Baker | 11 | The perception of symptom improvement (operative success) positively related to satisfaction | 5 grades (excellent, very good, good, fair, poor) | 2013 | UK | Cohort | 199 days | 22278 | NA | NA | NA | NA | OA | NA | NA | NA | NA | NA |
| Barlow | 12 | No difference between (1) stemmed prosthesis and non-stemmed prosthesis; (2) short (< 80 mm) stem and long (> 80 mm) stem; (3) one stem and two stems | Satisfied or not | 2016 | USA | Cohort | 2 years | 13825 | 4977 | 8848 | 67.5 | 30.4 | OA, inflammatory disease, AVN, post-trauma OA, fracture, other | NA | NA | NA | NA | NA |
| Barrack | 13 | No difference between patients with patellar resurfacing and those without it | Satisfied or not | 2001 | USA | Randomised controlled Trial | 70.5 months | 93 | NA | NA | NA | NA | OA | NA | Yes and no | MG II (CR) | Yes | NA |
| Barrack | 14 |
(1) Patients with incomes of less than USD 25,000, and women were less satisfied (2) Race, education, employment status and implant type (CR or PS, rotating platform, high flexion, gender specific) had no effect on satisfaction |
Satisfied or not | 2013 | USA | Cohort | 2.6 years | 661 | 256 | 405 | 54.0 | NA | OA | NA | NA | Unknown (52% CR, 27% PS, 9% rotating-platform, 6% high-flexion, 5% sex-specific) | NA | NA |
| Bican | 15 | Patients with fibromyalgia were less satisfied | 4 grades (very satisfied, satisfied, dissatisfied, very dissatisfied) | 2011 | USA | Case–control | 3.4 years | 180 | 2 | 57 | 61.0 | 34.0 | Fibromyalgia, OA | MPP | Yes | NA | Yes | Combined (spinal + epidural) or general |
| Bierke | 16 | Mean dissatisfaction scores were significantly higher in patients with somatisation dysfunction | 5 grades (very satisfied, satisfied, mediocre satisfied, unsatisfied, very unsatisfied) | 2016 | Germany | Cohort | 12 months | 100 | 37 | 63 | 60.6 | 29.9 | OA | MPP | No | Genesis II (CR) | Yes | General |
| Bierke | 17 | Patients with anxiety and particularly patients with pain catastrophizing tended to be dissatisfied | 5 grades (very satisfied, satisfied, mediocrely satisfied, unsatisfied, very unsatisfied) | 2017 | Germany | Cohort | 9 months | 138 | 87 | 51 | 69.0 | 29.9 | OA | MPP | NA | Genesis II | NA | General |
| Biyani | 18 | No difference between CS and PS | 5 grades (very satisfied, satisfied, neutral, dissatisfied, very dissatisfied) | 2017 | USA | Cohort | 1 year | 82 | 0 | 82 | 66.5 (Median) | 29.4 (Median) | NA | MPP | Yes | Triathlon (CS, PS) | NA | NA |
| Blyth | 19 | Using iNav Electromagnetic navigation system had no effect on satisfaction | 6 grades | 2015 | UK | Randomised controlled trial | 1 year | 198 | 116 | 82 | 65.5 | NA | OA | NA | NA | NexGen LPS-flex (PS) | Yes | NA |
| Boese | 20 | No difference between PFC Sigma rotating platform high flex and PFC Sigma rotating plat form | 5 grades | 2011 | USA | Case–control | 16.7 months | 153 | 63 | 90 | 64.0 | NA | OA | MPP | NA | PFC Sigma RP (rotating platform) (CR), PFC Sigma RP-F (rotating platform) (PS) | Yes | NA |
| Bonnin | 21 | Of the patients who reported they were as active as they expected to be before TKR, 98.2% were satisfied, while of the patients who reported they were insufficiently active, 52.3% were not satisfied (P < 0.0001) | 5 grades (very satisfied, satisfied, moderately satisfied, somewhat dissatisfied, dissatisfied) | 2010 | France | Cross-sectional | 44 months | 347 | 120 | 227 | 75.0 | 27.9 | OA, RA, AVN | NA | Yes and no | Noetos (PS), NexGen (PS)—282 mobile bearing, 65 fixed bearing |
Cemented tibia 338 Cemented femur 337 |
NA |
| Bourne | 22 | Patients with expectations not met, pre-operative pain at rest, and a post-operative complication requiring hospital readmission were less satisfied | 5 grades (very dissatisfied, dissatisfied, neutral, satisfied, very satisfied) | 2010 | Canada | Cross-sectional | 1 year | 1703 | 644 | 1059 | 69.3 | 32.0 | OA, RA, post-trauma OA, other | NA | Yes and no | Unknown (53% CR, 47% PS) | NA | NA |
| Bugada | 23 | Higher BMI and anxiety/depression levels were associated with dissatisfaction | VAS (0–10) | 2017 | Italy | Cohort | 6 months | 563 | 185 | 421 | 72 | NA | NA | NA | NA | NA | NA | General |
| Bullens | 24 | RA patients were more satisfied than OA patients | VAS (0–100) | 2001 | Netherlands | Cross-sectional | 4.9 years | 126 | NA | NA | 67.4 | NA | OA, RA, juvenile rheumatoid arthritis, haemophilic arthropathy | NA | Yes and no | PFC (95% CR, 5% PS) | Yes | NA |
| Burnett | 25 | No difference between patients with patellar resurfacing and those without it | Original questionnaire (41 points) | 2009 | USA | Randomised controlled trial | Minimum 10 years | 78 | NA | NA | 78.0 | NA | NA | NA | Yes and no | MG II (CR) | Yes | NA |
| Burnett | 26 | No difference between patients with patellar resurfacing and those without it | Original questionnaire | 2004 | USA | Randomised controlled trial | 7.3 years | 90 | 39 | 51 | 70.0 | 31.9 | OA | MPP | Yes and no | AMK (CR) | Hybrid (cemented tibia) | NA |
| Burnett | 27 | No difference between patients with patellar resurfacing and those without it | Original questionnaire (41 questions) | 2007 | USA | Randomised controlled trial | 110 months | 56 | 19 | 9 | 78.0 | NA | OA | NA | Yes and no | MG II (fixed bearing) (CR) | Yes | General |
| Chang | 28 | Patients with regular physical activity after TKR were more satisfied | VAS (0–10) | 2014 | South Korea | Cohort | 24 months | 369 | 30 | 339 | 68.8 | 27.4 | OA | NA | NA | NA | NA | NA |
| Chang | 29 | Post-operative severe pain relates to dissatisfaction | 4 grades (enthusiastic, satisfied, noncommittal, disappointed) | 2010 | South Korea | Cross-sectional | 1 year | 383 | 10 | 230 | 68.8 | 26.2 | OA | MPP | Yes | E-motion (mobile), Genesis II (fixed) | Yes | NA |
| Chinnappa | 30 | Radiologic leg length discrepancy (LLD) did not relate to patient satisfaction, but perception of LLD related to satisfaction | 5 grades | 2017 | Australia | Cohort | 6 months | 91 | 34 | 57 | 70.2 | 29.4 | OA, post-traumatic arthritis, AVN, RA | MPP | NA | PS implant made by Smith and Nephew | Yes | NA |
| Choi | 31 | No difference between standard PS rotating platform mobile bearing TKR and high flexion PS rotating platform mobile bearing TKR | 5 grades | 2010 | South Korea | Randomised controlled trial | 28 months | 170 | 9 | 119 | 70.5 | 26.6 | OA | MPP | Yes | PFC Sigma RP (rotating platform) (PS), PFC Sigma RP-F (rotating platform) (PS) | Yes | NA |
| Choi | 32 |
(1) Mobile bearing group is better than medial-pivot fixed bearing group in satisfaction (2) Patients with flexion contracture are less satisfied |
New KSS (40 points) | 2016 | South Korea | Cohort | Minimum 5 years | 101 | 12 | 89 | 67.1 | 27.5 | OA | MPP | Yes | 52 ACS (mobile bearing), 49 Advance (fixed bearing) | Yes | General |
| Clement | 33 | Patients with poor mental health were less satisfied | 4 grades (very satisfied, satisfied, neutral, unsatisfied) | 2013 | UK | Cohort | 1 year | 962 | 418 | 544 | 70.5 | NA | OA | NA | Yes and no | Kinemax, PFC sigma, Triathlon | NA | NA |
| Clement | 34 | Patients with back pain were less satisfied | 4 grades (very satisfied, satisfied, neutral, dissatisfied) | 2013 | UK | Cohort | 1 year | 2392 | 1017 | 1375 | 70.4 | NA | OA | NA | NA | Kinemax, Triathlon, PFC Sigma | NA | NA |
| Clement | 35 | Diabetes melitus had no effect on satisfaction | 4 grades (very satisfied, satisfied, uncertain, unsatisfied) | 2013 | UK | Cohort | 1 year | 2392 | 1014 | 1375 | 70.3 | NA | OA | NA | NA | Kinemax, Triathlon, PFC Sigma | NA | NA |
| Clement | 36 | Patients with a subclinical improvement in their general physical well-being were less likely to be satisfied | 4 grades (very satisfied, satisfied, neutral, unsatisfied) | 2013 | UK | Cohort | 12 months | 2330 | 996 | 1334 | 70.2 | NA | OA | NA | NA | Kinemax, Triathlon, PFC Sigma | Yes | NA |
| Clement | 37 | Post-operative OKS positively related to satisfaction | 4 grades (very satisfied, satisfied, neutral, unsatisfied) | 2013 | UK | Cohort | 1 year | 2392 | 1017 | 1357 | 70.4 | NA | OA | NA | NA | Kinemax, PFC sigma, Triathlon | NA | NA |
| Clement | 38 | Pre-operative OKS and improvement in OKS positively related to satisfaction | 4 grades (very satisfied, satisfied, unsure, unsatisfied) | 2013 | UK | Cross-sectional | 1 year | 966 | 421 | 545 | 70.6 | NA | OA | NA | NA | Kinemax, PFC sigma, Triathlon | NA | NA |
| Clement | 39 | Using ASM navigation did not relate to satisfaction | 4 grades (very satisfied, satisfied, uncertain, unsatisfied) | 2017 | UK | Cohort | 1 year | 295 | 121 | 174 | 68.4 | 31.0 | OA | MPP | NA | NA | Yes | NA |
| Clement | 40 | Age and gender did not relate to satisfaction. The risk of dissatisfaction was significantly increased if a patient’s expectation was not achieved | 4 grades (very satisfied, satisfied, neutral, unsatisfied) | 2014 | UK | Cohort | 1 year | 322 | 128 | 194 | 70.5 | NA | OA | NA | NA | Kinemax, Triathlon, PFC Sigma | Yes | NA |
| Clement | 41 | No difference in gap balanced technique and measured resection technique in computer-navigated TKR | 5 grades (very satisfied, satisfied, neutral, unsatisfied, very unsatisfied) | 2017 | UK | Cohort | 5.4 years | 144 | 65 | 79 | 69.0 | 31.2 | NA | MPP | NA | Columbus | Yes | NA |
| Collados-Maestre | 42 |
(1) Patients with pre-operative low back pain were less satisfied (2) Patients with severe low back pain were less satisfied than patients with moderate low back pain |
VAS (0–10) | 2016 | Spain | Cohort | 3.2 years | 48 | 19 | 29 | 73.7 | 30.4 | OA | MPP | Yes | Trekking (CR) | Hybrid (cemented tibia) | Spinal |
| Collados-Maestre | 43 | Single radius prosthesis group was better than multi radius prosthesis group | 5 grades (very satisfied, satisfied, neutral, dissatisfied, very dissatisfied) | 2016 | Spain | Randomised controlled trial | 5.7 years | 237 | 72 | 165 | 71.0 | 31.0 | OA | MPP | Yes | Trekking (fixed bearing) (CR, single-radius), Multigen (fixed bearing) (CR, multi-radius) | Hybrid (cemented tibia) | Spinal |
| Conditt | 44 | No difference between PS and CR | Total Knee Function Questionnaire | 2004 | USA | Cohort | 1 year | 49 | 21 | 28 | 70.5 | NA | NA | NA | NA | AMK (21 PS, 28 CR) | NA | NA |
| Devers | 45 | Post-operative passive knee flexion did not relate to satisfaction | 5 grades | 2011 | USA | Cross-sectional | 4 years | 122 | 29 | 93 | 69.0 | 30.8 | OA, RA, post-trauma OA | NA | NA | PFC Sigma (PS) | NA | NA |
| Dixon | 46 | Patients with Triathlon were more satisfied than those with Kinemax Plus | 4 grades | 2014 | UK | Cohort | 12 months | 453 | 150 | 303 | 69.0 | NA | OA, RA | NA | Yes and no | Triathlon (fixed bearing) (92% CR, 8% PS), Kinemax plus (53% fixed bearing) | Yes | NA |
| Dhurve | 47 |
(1) Age and BMI did not relate to satisfaction (2) Poor improvement of range of motion (ROM), pain catastrophizing and depression, severe swelling and unwilling to do post-operative rehabilitation programs related to dissatisfaction |
5 grades (very satisfied, satisfied, neutral, dissatisfied or very dissatisfied) | 2016 | Australia | Cross-sectional | Minimum 1 year | 301 | 142 | 159 | 73.9 | 30 | NA | NA | NA | NA | NA | NA |
| Dickstein | 48 | Severe pain and inability to use the stairs related to dissatisfaction | Satisfied or not | 1997 | Israel | Cross-sectional | 12 months | 79 | 26 | 53 | 70 | NA | OA | NA | NA | NA | Yes | NA |
| Duivenvoorden | 49 | Patients with pre-operative depressive or anxiety symptoms were less satisfied | 5 grades | 2013 | Netherlands | Cohort | 12 months | 128 | 56 | 72 | 66.2 | NA | OA | NA | NA | NA | NA | NA |
| Filardo | 50 | Control Preference Scale related to satisfaction | NRS (0–10) | 2016 | Italy | Cohort | 12 months | 176 | 56 | 120 | 66 | 28.0 | OA | MPP | NA | NA | NA | NA |
| Franklin | 51 | Patients who used narcotics before TKA were more likely to be dissatisfied | Unclear | 2010 | USA | Cohort | 12 months | 6346 | 2065 | 4224 | 67.4 | 31.9 | OA | NA | NA | NA | NA | NA |
| Fricka | 52 | No difference between cemented TKR and cementless TKR | Satisfied or not | 2015 | USA | Randomised controlled trial | 2 years | 99 | 37 | 62 | 59.3 | 32.0 | NA | Subvastus | Yes | NexGen CR-flex (fixed bearing) (CR) |
50 Yes 49 No |
NA |
| Furu | 53 | Patients with greater knee extensor strength were more satisfied | New KSS (40 points) | 2016 | Japan | Cohort | 1 year | 30 | 4 | 24 | 73.6 | 25.5 | OA, RA | MPP | Yes | Bi-surface, NexGen LPS-flex (fixed bearing) (PS) | Yes | NA |
| Giurea | 54 | Patients with specific personality traits (life satisfaction, performance orientation and emotional stability) were more satisfied | Satisfied or not | 2016 | Austria | Cohort | Minimum 2 years | 70 | 32 | 48 | 66.0 | NA | OA | MPP | Yes | E.motion UC (rotating platform) (CR) | Yes | NA |
| Gong | 55 | Significantly different satisfaction rate amongst the four personality: choleric type, 74.2%; sanguine type, 92.3%; melancholic type, 81.2%; phlegmatic type, 87.3% | VAS (0–100) | 2014 | China | Cross-sectional | 6 months | 387 | 109 | 278 | 59.6 | 27.8 | OA | NA | NA | Gemini MK II | NA | Epidural or nerve block |
| Goodman | 56 | No difference between RA patients and OA patients | 5 grades | 2016 | USA | Cohort | 2 years | 4456 | 1852 | 2604 | 67.1 | 30.7 | OA, RA | NA | NA | NA | NA | NA |
| Goudie | 57 | Patients with post-operative flexion contracture of 5 degrees or greater were less satisfied | 4 grades (very satisfied, satisfied, unsure, dissatisfied) | 2011 | UK | Cohort | 2 years | 811 | 317 | 489 | 69.0 | 30.5 | OA | NA | NA | Unknown (779 CR, 32 PS) | NA | NA |
| Gustke | 58 | By using Orthosensor, 96.7% in the medial-lateral balanced group and 82.0% in the unbalanced group were satisfied | 5 grades | 2014 | USA | Cohort | 1 year | 137 | 47 | 90 | 71.0 | 30.5 | OA | MPP, subvastus, midvastus | Yes | NA | Yes | NA |
| Ha | 59 | Patients with greater improve in ROM following TKR were more satisfied | 4 grades (very satisfied, somewhat satisfied, somewhat dissatisfied, very dissatisfied) | 2016 | South Korea | Cohort | 3.2 years | 630 | 58 | 572 | 66.2 | 26.7 | OA, RA, AVN | NA | No | 206 NexGen LPS-flex (PS), 163 Genesis II, 160 Triathlon, 101 Vanguard | NA | NA |
| Hamilton | 60 | Patients using Triathlon prosthesis were more satisfied than those using Kinemax prosthesis | 4 grades (very satisfied; satisfied; unsure, dissatisfied) | 2015 | UK | Randomised controlled trial | 3 years | 212 | 81 | 131 | 69.0 | NA | OA | NA | No | Triathlon (fixed bearing) (CR), Kinemax (fixed bearing) (CR) | Yes | NA |
| Harvie | 61 | Computer-navigated TKA did not relate to satisfaction | 5 grades | 2010 | Australia | Randomised controlled trial | 5 years | 46 | 18 | 28 | 70.1 | NA | OA and RA | NA | No | NA | NA | NA |
| Hawker | 62 | Less education and greater BMI negatively related to satisfaction | 5 grades | 1998 | Canada, USA | Cross-sectional | Minimum 2 years | 1193 | 344 | 849 | 72.6 | NA | OA, RA, post-trauma OA, other | NA | NA | NA | NA | NA |
| Heesterbeek | 63 | No difference between fixed and mobile bearing | NRS (0–10) | 2016 | Netherlands | Cross-sectional | 10 years | 189 | 52 | 106 | 67.1 | 28.6 | OA | NA | Yes and no | NA | NA | NA |
| Hernandez-Vaquero | 64 | Minimally invasive surgery had no effect on satisfaction | VAS (0–10) | 2010 | Spain | Randomised controlled study | 6 months | 62 | 11 | 51 | 70.6 | 31.5 | OA | Mini-midvastus, MPP | Yes | Triathlon (CR) | Yes | NA |
| Hinarejos | 65 | No difference between single radius prosthesis and multi-radius prosthesis | VAS (0–10) | 2016 | Spain | Cohort | 5 years | 474 | 126 | 348 | 72.2 | 31.3 | OA | MPP | Yes | Triathlon (PS, single-radius), Genutech (PS, multi-radius) | Yes | NA |
| Hirschmann | 66 | Lateral subvastus approach related to better satisfaction | VAS (0–10) | 2010 | Switzerland | Cohort | 2 years | 143 | 55 | 88 | 69 | 30 | OA | Lateral parapatellar approach, subvastus approach, or MPP | Yes and No | NA | Yes or hybrid | NA |
| Hui | 67 | No difference between oxidised zirconium and cobalt–chromium femoral components | British Orthopaedic Association grading system | 2011 | Australia | Randomised controlled trial | 5 years | 80 | 15 | 25 | NA | NA | OA | MPP | Yes | Genesis II | Yes | Spinal and/or epidural |
| Huijbregts | 68 |
(1) Coronal alignment of the femoral component was 0.5 degrees more accurate (P < 0.05) in patients who were satisfied (2) Dissatisfaction was associated with OKS |
5 grades (very satisfied, satisfied, neutral/not sure, dissatisfied, very dissatisfied) | 2016 | Australia | Cohort | 1 year | 230 | 105 | 106 | 69.0 | 30.2 | OA, RA, AVN, unknown | MPP, lateral parapatellar | Yes and no (including patellectomy) | Genesis II, Legion, ACS (139 CR, 91 PS) | NA | NA |
| Hwang | 69 | Patellar resurfacing did not relate to satisfaction | Satisfied or not | 2011 | South Korea | Case–control | 7 years | 275 | 6 | 264 | 68 | 26.5 | OA | MPP | Yes and no | LCS (mobile bearing) | Yes | NA |
| Jacobs | 70 | Patients with intact ACL (at the time of CR TKR) were less satisfied | 3 grades (satisfied, I'm not sure, dissatisfied) | 2016 | USA | Cohort | 5.1 years | 562 | 183 | 379 | 65.0 | 34.0 | NA | NA | NA | Vanguard Mono-lock (CR) | NA | NA |
| Jacobs | 71 |
(1) African American patients were 3.0 times more likely to be dissatisfied than Caucasians (2) Patients with mild degenerative changes were 2.1 times more likely to be dissatisfied than patients with severe degenerative changes |
3 grades (yes (satisfied), I'm not sure, no) | 2014 | USA | Cross-sectional | 3.5 years | 989 | 326 | 663 | 65.0 | 34.3 | OA | MPP | Yes | Unknown (CR) | NA | NA |
| Jacobs | 72 |
(1) No difference in age, gender and BMI between satisfied patients and dissatisfied patients (2) Satisfied patients showed greater improvement in ROM, Knee Society pain score and Knee Society function score than dissatisfied patients |
4 grades (yes (satisfied), I'm not sure, no) | 2014 | USA | Cross-sectional | 2.8 years | 768 | 247 | 521 | 65.0 | 34.3 | OA | NA | Yes | Vanguard complete femoral component with Monolock tibial component (CR) | NA | NA |
| Jacobs | 73 | Patients with movement-elicited pain or pain at rest were less satisfied | 3 grades (yes (satisfied), I'm not sure, no) | 2015 | USA | Cohort | 3.8 years | 316 | 91 | 184 | 65.1 | 33.9 | OA | NA | NA | Unknown (CR) | NA | NA |
| Jacobs | 74 | Patients with intra-operative greater forces (> 10 lbf) in the medial compartment than in the lateral compartment in extension were more satisfied | Satisfied or not | 2016 | USA | Cohort | 6 months | 50 | 21 | 29 | 66.1 | 34.5 | OA | MPP | NA | Vanguard (CR), Persona (CR) | NA | NA |
| Jain | 75 | Patient satisfaction was higher in the Vega and Genesis II groups than the E.motion group | British Orthopaedic Association grading system | 2017 | UK, South Korea, India | Cohort | 2 years | 627 | 30 | 597 | 69.6 | 27.3 | OA | MPP | Yes | Vega-PS, E.motion-PS, Genesis II | Yes | NA |
| Kaneko | 76 | The varus ligament balance with 30, 60 degrees of flexion negatively correlated with satisfaction | New KSS (40 points) | 2016 | Japan | Case series | 2 years | 39 | 8 | 31 | 78 | 24.4 | OA | NA | NA | Bi-cruciate stabilised substituting (BCS) prosthesis | Yes | NA |
| Kawahara | 77 |
(1) Patients with internal rotation of the femoral component greater than 3 degrees relative to the surgical epicondylar axis were less satisfied (2) Internal or external malrotation of tibial component had no effect on satisfaction |
New KSS (40 points) | 2014 | Japan | Cross-sectional | 3.9 years | 92 | NA | NA | 75.7 | 25.6 | OA | NA | Yes | NexGen LPS-flex (fixed bearing) (PS) | NA | NA |
| Kawakami | 78 | No significant difference between CR and PS | New KSS (40 points) | 2015 | Japan | Randomised controlled trial | 98 months | 48 | 8 | 40 | 74.2 | NA | OA | MPP | NA | NexGen CR-flex (CR), NexGen LPS-flex (PS) | Na | NA |
| Keurentjes | 79 | Patients with severe radiographic OA (K/L grades 3, 4) were more satisfied than patients with mild radiographic OA (K/L grades 0, 1 and 2) | NRS (0–10) | 2013 | Netherlands | Cohort | 2.82 years | 278 | 86 | 192 | 69.2 | NA | OA | NA | NA | NA | NA | NA |
| Keurentjes | 80 | Completed level of schooling had no effect on satisfaction | NRS (0–10) | 2013 | Netherlands | Cohort | 3.16 years | 262 | 88 | 174 | 67.7 | NA | OA | NA | NA | NA | NA | NA |
| Khamis | 81 | No difference between Scorpio NRG CR and PFC Sigma CR | Satisfied or not | 2013 | Bahrain | Cohort | 1 year | 299 | 145 | 154 | 65.9 | NA | OA | MPP | NA | Scorpio NRG (CR), PFC Sigma (CR) | NA | NA |
| Kim | 82 | Patients with medial pivot fixed bearing prosthesis were less satisfied than those with PFC Sigma mobile bearing prosthesis | VAS (0–10) | 2008 | South Korea | Randomised controlled study | 2.6 years | 184 | 7 | 85 | 69.5 | 27.8 | OA | MPP | Yes | Advance (fixed bearing) (CR), PFC Sigma (mobile bearing) (CR) | Yes | NA |
| Kim | 83 | Patients with rotating platform (E.motion RP) were more satisfied than those with floating platform (E.motion FP) | 4 grades (enthusiastic, satisfied, not committed, disappointed) | 2009 | South Korea | Cohort | 24 months | 186 | 9 | 177 | 68.5 | 26.3 | NA | MPP | Yes | 93 E.motion FP (CR), 93 E.motion RP (PS) | Yes | NA |
| Kim | 84 | No difference between gender-specific LPS-flex and conventional LPS-flex | VAS (0–10) | 2010 | South Korea | Randomised controlled study | 2.13 years | 170 | 0 | 85 | 69.7 | 27.1 | OA | MPP | Yes | LPS-flex (gender specific, conventional) (PS) | Yes | NA |
| Kim | 85 | No difference between patients with patellar resurfacing and those without it using high-flexion prosthesis | 5 grades (fully satisfied, satisfied, barely satisfied, dissatisfied, very dissatisfied) | 2014 | South Korea | Cohort | Minimum 7 years | 92 | 8 | 84 | 66.2 | 27.0 | OA | MPP | Yes and No | NexGen LPS-flex (fixed bearing) (PS) | Yes | NA |
| Kim | 86 | Poor pre-operative WOMAC pain score and post-operative decrease in range of motion negatively related to dissatisfaction | 4 grades (enthusiastic, satisfied, noncommittal, disappointed) | 2009 | South Korea | Cross-sectional | Minimum 12 months | 438 | 9 | 261 | 68.4 | 26.4 | OA | MPP | Yes | Genesis II (fixed bearing), E.motion (mobile bearing) | Yes | NA |
| Kim | 87 | No difference between NexGen CR-flex and NexGen CR | VAS (0–10) | 2009 | South Korea | Randomised controlled study | 3.13 years | 108 | 5 | 49 | 69.7 | 26.7 | OA | MPP | Yes | NexGen (CR), NexGen CR-flex (CR) | Yes | NA |
| Kim | 88 | No difference between standard NexGen CR-flex and gender-specific NexGen CR-flex | VAS (0–10) | 2010 | South Korea | Randomised controlled study | 3.25 years | 276 | 0 | 138 | 71.2 | 27.3 | OA | NA | Yes | NexGen CR-flex (gender specific, conventional) (CR) | Yes | NA |
| Kim | 89 | Dissatisfied patients tended to perceive high flexion activities to be more important than satisfied patients | 4 grades (enthusiastic, satisfied, not committed, disappointed) | 2010 | South Korea | Cross-sectional | Minimum 12 months | 261 | 0 | 261 | 68.4 | 26.7 | OA | MPP | Yes | 216 Genesis II (fixed bearing), 208 E.motion (mobile bearing) | Yes | NA |
| Kim | 90 | No significant influence by post-operative leg length discrepancy | 5 grades (fully satisfied, satisfied, barely satisfied, dissatisfied, very dissatisfied) | 2015 | South Korea | Cohort | 30 months | 148 | 15 | 133 | 69.5 | 26.6 | OA | Midvastus | No | Columbus (PS) | Yes | NA |
| Kim | 91 | PFC CR mobile-bearing Sigma were better than Medial-Pivot knee prosthesis about satisfaction | 4 grades | 2017 | South Korea | Randomised controlled study | 12.1 years | 364 | 52 | 130 | 65.6 | 29.8 | OA | MPP | Yes | Medial-Pivot (PS), PFC Sigma CR | Yes | NA |
| Kim | 92 | Cement use did not relate to satisfaction | VAS (0–10) | 2013 | South Korea | Randomised controlled study | 16.6 years | 160 | 17 | 63 | 54.3 | 27.8 | OA | MPP | Yes | NexGen CR | Yes | NA |
| Kim | 93 | Using a highly cross-linked polyethylene did not relate to satisfaction in PS TKR | VAS (0–10) | 2014 | South Korea | Case–control | 5.9 years | 308 | 20 | 288 | 60.3 | 29.1 | OA | MPP | Yes | Yes | Yes | NA |
| Klit | 94 | There were no statistically significant differences in the outcome of pre-operatively depressed and non-depressed patients concerning satisfaction | 5 grades (very satisfied, satisfied, neutral, dissatisfied and very dissatisfied) | 2013 | Denmark | Cohort | 12 months | 115 | 54 | 61 | 54 | NA | OA | MPP | NA | CR, fixed (AGC, PFC, Triathlon), CR, rotating bearing (PFC-Sigma Vanguard ROCC, NexGen), PS, fixed (LPS-flex) | NA | NA |
| Kornilov | 95 | The patients who reported ‘very good’ overall satisfaction tended to be younger | 5 grades | 2017 | Russia, Norway | Cohort | 1 year | 79 | 4 | 65 | 63 | NA | OA | MPP | NA | NA | Yes | Spinal |
| Kosse | 96 | Satisfaction did not improve by using patient-specific instrumentation | VAS (0–10) | 2017 | Netherlands | Randomised controlled trial | 12 months | 42 | 20 | 22 | 63.1 | 27.95 | OA | MPP | Yes | Genesis II (PS, fixed) | Yes | |
| Kotela | 97 | No difference between patient-specific CT-based instrumentation (signature) and conventional | VAS (0–100) | 2015 | Poland | Randomised controlled trial | 12 months | 95 | 29 | 66 | 66.3 | 29.8 | OA | MPP | No | Vanguard (CR) | No | NA |
| Krushell | 98 | 85% of patients with BMI > 40 were satisfied and 95% of patients with BMI < 30 were satisfied | Satisfied or not | 2007 | USA | Case–control | 90 months | 78 | NA | NA | 68.1 | 35.0 | OA | MPP, midvastus | Yes | Osteonics series 3000, Osteonics series 7000, Scorpio | Yes | NA |
| Khuangsirikul | 99 | Computer-assisted TKA did not relate to satisfaction | Original questionnaire | 2016 | Thailand | Cohort | 10 years | 144 | 14 | 130 | 76.9 | NA | OA | NA | NA | NA | NA | NA |
| Kuriyama | 100 | Post-operative noise had no relation to satisfaction | New KSS (40 points) | 2016 | Japan | Cross-sectional | 12 months | 35 | NA | NA | NA | NA | OA, RA. AVN | NA | NA | Bi-surface (fixed bearing) (PS) | NA | NA |
| Kuroda | 101 | No item in pre-operative new Knee Society Scores (objective knee indicators, symptoms, satisfaction, expectations, functional activities) had impact on satisfaction | New KSS (40 points) | 2016 | Japan | Cohort | 1 year | 79 | 12 | 63 | 74.8 | NA | OA, AVN, RA | NA | NA | PFC Sigma, e-motion | NA | NA |
| Kwon | 102 | Generalised joint laxity did not relate to satisfaction | VAS (0–10) | 2016 | South Korea | Case–control | 3 years | 338 | 0 | 338 | 68 | 25.9 | OA | MPP | Yes | PFC | Yes | NA |
| Kwon | 103 | Intra-operative periarticular injection with corticosteroid did not improve satisfaction | VAS (0–10) | 2013 | South Korea | Randomised controlled trial | 6 months | 76 | 0 | 76 | 69.3 | 25.9 | OA | MPP | No | PFC sigma PS | Yes | NA |
| Lehnen | 104 | Computer-assisted TKR was better than conventional TKR regarding satisfaction | 5 grades (extremely satisfied, very satisfied, moderately satisfied, slightly satisfied, not at all satisfied) | 2011 | Switzerland | Cohort | 12 months | 165 | 59 | 106 | 70.0 | NA | NA | MPP | NA | LCS (mobile bearing) | Yes | NA |
| Li | 105 | Continuous irrigation of 4000 ml cold saline with 0.5% epinephrine group was better than normal temperature solution group | VAS (0–10) | 2016 | China | Cohort | 60 h | 389 | 53 | 336 | 61.0 | 28.7 | OA | NA | NA | Gemini Link (CR) | Yes | Epidural or nerve block |
| Lim | 106 | No difference between patients with and without history of previous knee surgery (anterior cruciate ligament reconstruction or high tibial osteotomy) | 6 grades (excellent, very good, good, fair, poor; terrible) | 2016 | Singapore | Cross-sectional | 2 years | 303 | 220 | 83 | 65.0 | 27.2 | OA | MPP | NA | NA | NA | NA |
| Lingard | 107 | No difference amongst TKRs undertaken in the USA, UK and Australia | 4 grades (very satisfied to very dissatisfied) | 2006 | USA, UK, Australia | Cohort | 12 months | 598 | 254 | 344 | 69.3 | 29.3 | OA | NA | Yes and no | Kinemax | Yes | NA |
| Liow | 108 | No difference between iASSIST computer-assisted stereotaxic navigation group and conventional group | 6 grades | 2016 | Singapore | Case–control | 6 months | 192 | 53 | 139 | 65.5 | 27.9 | OA | MPP | NA | NA | NA | NA |
| Liow | 109 | No difference between robotic-assisted TKR and conventional TKR | 6 grades | 2016 | Singapore | Randomised controlled trial | 2 years | 60 | NA | NA | 67.9 | NA | OA | MPP | Yes | NexGen LPS-flex (PS) | NA | NA |
| Lizaur-Utrilla | 110 | Patients with mobile bearing insert were more satisfied than those with fixed bearing insert | VAS (0–10) | 2012 | Spain | Randomised controlled trial | 2 years | 119 | 25 | 94 | 74.2 | 32.0 | OA | MPP | Yes | Trekking mobile bearing (CR), Multigen Plus fixed bearing (CR) | Hybrid (cemented tibia) | Epidural |
| Lizaur-Utrilla | 111 | Dissatisfaction rate was higher in patients waiting longer than 6 months | 5 grades (very satisfied, satisfied, neutral, dissatisfied, very dissatisfied) | 2016 | Spain | Cohort | 1 year | 192 | 65 | 127 | 69.7 | 30.7 | OA | MPP | Yes | Trekking | Hybrid (cemented tibia) | Spinal |
| Lizaur-Utrilla | 112 | Satisfaction was higher in the octogenarian group than the septuagenarian | VAS (0–10) | 2016 | Spain | Cohort | 3.2 years | 292 | 212 | 80 |
83.1 G1 75.2 G2 |
30.2 | OA | NA | Yes | Yes | Hybrid | Epidural |
| Losina | 113 | Patients having a lack of hospital choice were less satisfied | 4 grades (very satisfied, somewhat satisfied, somewhat dissatisfied, very dissatisfied) | 2005 | USA | Cross-sectional | 2 years | 932 | 308 | 624 | 74.0 | NA | OA, other | NA | NA | NA | NA | NA |
| Lygre | 114 |
(1) Patella resurfacing did not relate to satisfaction (B) Patients with NexGen were more satisfied than those with AGC |
VAS (0–100) | 2010 | Norway | Case–control | 7.1 years | 972 | 281 | 691 | 76.0 | NA | OA | NA | Yes and No | AGC (CR), Genesis I (CR), NexGen (CR), LCS (CR) | NA | NA |
| Machhindra | 115 | No difference between Ultra Congruent prosthesis and PS prosthesis | 4 grades (enthusiastic, satisfied, noncommittal, disappointed) | 2015 | South Korea | Cohort | 2 years | 281 | 10 | 219 | 80.0 | 27.4 | OA | MPP | Yes | E.motion ultra-congruent (mobile bearing) (UC), E.motion (mobile bearing) (PS) | Yes | NA |
| Maddali | 116 | No difference between outcomes of one-stage and two-stage TKR for bilateral knee arthritis | 4 grades (very satisfied, satisfied, unsure, dissatisfied) | 2015 | China | Cohort | 2.4 years | 278 | 46 | 93 | 68.9 | 24.0 | OA, RA | MPP | No | Gemini MK II (mobile bearing) (PS) | Yes | General |
| Mannion | 117 | Patients with problems in other joints and poor improvement in symptoms and function were less satisfied | 4 grades (very satisfied, somewhat satisfied, somewhat dissatisfied, very dissatisfied) | 2009 | Switzerland | Cross-sectional | 2 years | 112 | 34 | 78 | 67.0 | NA | OA | NA | NA | NA | NA | NA |
| Matsuda | 118 | Old age and varus post-operative alignment negatively related to satisfaction | New KSS (40 points) | 2013 | Japan | Cross-sectional | 5 years | 375 | 64 | 311 | 71.0 | 26.0 | OA, RA, other | NA | Yes | Unknown (82% PS, 18% CR) | NA | NA |
| Matsumoto | 119 | Patient satisfaction exhibited positive correlations with joint component gap difference | New KSS (40 points) | 2017 | Japan | Cohort | 1 year | 35 | 6 | 29 | 75.5 | NA | OA | MPP | NA | E-motion floating platform mobile-bearing CR | NA | NA |
| Mayman | 120 | More patients were extremely satisfied with patellar resurfacing | 4 grades (extremely satisfied, satisfied, unsure, or disappointed) | 2003 | Canada | Randomised controlled trial | 2 years | 100 | 42 | 58 | 72 | NA | OA | NA | Yes and no | NA | Yes | NA |
| McLawhorn | 121 | Patients with reported allergies were less satisfied | 3 grades (somewhat to very satisfied, neither satisfied or dissatisfied, somewhat to very dissatisfied) | 2015 | USA | Cohort | 2 years | 257 | 119 | 138 | 67.5 | 30.1 | NA | NA | NA | Unknown (PS) | Yes | NA |
| Meftah | 122 | No significant difference between rotating platform and fixed bearing | VAS (0–10) | 2016 | USA | Cohort | 12.3 years | 55 | 16 | 24 | 54.3 | 31.8 | OA, RA, post-trauma OA | MPP | Yes | PFC Sigma (20 rotating platform, 34 fixed bearing) (PS) | Yes | NA |
| Meijerink | 123 | Patients with PFC prosthesis were more satisfied than those with CKS prosthesis | VAS (0–100) | 2011 | Netherlands | Randomised controlled trial | 5.6 years | 77 | 27 | 50 | 67.0 | 29.0 | OA, RA | MPP | No | PFC (fixed bearing) (CR), CKS (fixed bearing) (CR) | Yes | NA |
| Meijerink | 124 | There was no relation between surgeon’s pre-operative assessment of the difficulty or surgeon’s immediate post-operative satisfaction and patient’s satisfaction | VAS (0–100) | 2009 | Netherlands | Cohort | 1 year | 53 | 15 | 36 | 67.0 | NA | OA, RA | NA | NA | PFC, CKS | NA | NA |
| Merle-Vincent | 125 | Absence of complications, BMI less than 27, high radiological joint narrowing score, age greater or equal to 70 years and absence of depression positively related to satisfaction | 5 grades (0, 25, 50, 75, 100% of satisfaction) | 2011 | France | Cohort | 2 years | 264 | 78 | 186 | 75.0 | 28.4 | OA | NA | NA | NA | NA | NA |
| Miner | 126 |
(1) WOMAC pain score and WOMAC function score were positively related to satisfaction (2) Knee flexion angle, age, gender and BMI did not relate to satisfaction |
4 grades | 2003 | UK | Cohort | 12 months | 684 | 283 | 401 | 69.8 | 29.5 | OA | NA | NA | Kinemax | NA | NA |
| Mistry | 127 | Presence of altered sensation did not affect satisfaction | British Orthopaedic Association grading system & VAS (0–10) | 2005 | New Zealand | Cohort | 1 year | 29 | 8 | 21 | 72.7 | NA | NA | NA | NA | NA | NA | NA |
| Mont | 128 | Patient’s pre-operative activity level did not relate to satisfaction | VAS (0–10) | 2007 | USA | Cohort | 7 years | 144 | 44 | 70 | 70.0 | 29.0 | OA, RA, AVN | NA | NA | Duracon (CR) | NA | NA |
| Murphy | 129 | No difference between patients with femoral component implanted in 4 degrees flexion in the sagittal plane and those with femoral component implanted in a neutral position | NRS (0–10) | 2014 | Australia | Randomised controlled trial | 1 year | 40 | 15 | 25 | 70.3 | 30.5 | OA | MPP | No | Profix (CR) | NA | NA |
| Nakahara | 130 | Post-operative ability of climbing up or down a flight of stairs, getting into or out of a car, moving laterally (stepping to the side) and walking and standing effected on satisfaction | New KSS (questions 3, 4, 5 only) | 2015 | Japan | Cross-sectional | 5 years | 520 | 62 | 325 | 72.0 | NA | OA, RA, AVN | NA | NA | Unknown (82% PS, 18% CR) | NA | NA |
| Nakano | 131 | Use of CT-free navigation had no effect on satisfaction | New KSS (40 points) | 2013 | Japan | Cohort | 118 months | 27 | 3 | 24 | 71.5 | NA | OA | MPP | NA | PFC Sigma (PS) | NA | NA |
| Nam | 132 | Patients with metallic allergy were less satisfied | New KSS (40 points) | 2016 | USA | Cohort | Minimum 2 years | 589 | 226 | 363 | 62.3 | 32.9 | NA | NA | NA | NA | NA | NA |
| Nam | 133 |
(1) Female patients, patients from low-income households (< USD 25,000 annually) were less satisfied (2) Education level, employment status and using custom cutting guides, gender-specific prosthesis, high-flex prosthesis, rotating platform bearing or kinematic alignment technique had no effect on satisfaction |
Satisfied or not | 2014 | USA | Cross-sectional | 2.6 years | 661 | NA | NA | 54.3 | NA | OA | NA | NA | Vanguard | Yes | NA |
| Nam | 134 | Using custom cutting guides (signature) had no effect on satisfaction | Satisfied or not | 2016 | USA | Cohort | 3 years | 448 | 154 | 294 | 61.9 | NA | OA | Midvastus | Yes | Vanguard (fixed bearing) (CR) | Yes | NA |
| Narayan | 135 | Deep knee flexion did not relate to patient satisfaction after TKR (even in a population where squatting and sitting cross-legged are part of the normal lifestyle) | 5 grades (extremely satisfied, satisfied, neutral, unsatisfied, extremely unsatisfied) | 2009 | India | Cohort | 25.12 months | 36 | 10 | 17 | 58.7 | NA | OA | NA | NA | PFC, Genesis II (23 CR, 13 PS) | NA | NA |
| Nishio | 136 | Regarding intra-operative kinematic patterns, medial pivot group were more satisfied than non-medial pivot group | New KSS (40 points) | 2014 | Japan | Cross-sectional | 42 months | 40 | 8 | 32 | 73.0 | 25.6 | OA | Subvastus | Yes | PFC Sigma RP-F (mobile bearing) (PS) | NA | NA |
| Noble | 137 | Age less than 60, absence of residual symptoms, fulfilment of expectations and absence of functional impairment positively related to satisfaction | Total Knee Function Questionnaire | 2006 | USA | Cross-sectional | Minimum 1 year | 253 | 105 | 148 | 68.1 | NA | OA, RA, post-trauma OA | NA | NA | NA | NA | NA |
| Nunez | 138 | Post-operative WOMAC score related to satisfaction | 5 grades | 2009 | Spain | Cohort | 7 years | 112 | 26 | 86 | 67.3 | 30.7 | OA | NA | NA | NA | NA | NA |
| Nunley | 139 | In CR TKR, rotating platform, gender-specific design and high flex design had no effect on satisfaction (compared with conventional CR prosthesis) | Satisfied or not | 2015 | USA | Cohort | 2.6 years | 527 | 196 | 331 | 55.6 | NA | OA, post-trauma OA, AVN | NA | NA | Vanguard (CR), unknown (rotating platform (CR, PS), gender-specific (CR), high-flex (CR)) | NA | NA |
| Park | 140 | In simultaneous bilateral TKR, there was no difference between cemented and cementless TKR | VAS (0–10) | 2011 | South Korea | Randomised controlled trial | 13.6 years | 100 | 11 | 39 | 58.4 | 26.6 | OA, inflammatory disease | MPP | Yes | NexGen (CR) | Yes and no | NA |
| Parsley | 141 | No difference between PS and ultra-congruent prosthesis | Total Knee Function Questionnaire | 2006 | USA | Cohort | Minimum 2 years | 209 | 61 | 148 | 67.9 | 29.9 | NA | Midvastus | NA | Sulzer Apollo (PS), Sulzer NK-II Ultra-congruent | Yes | NA |
| Perez-Prieto | 142 | Pre-operative depression had no effect on satisfaction | Satisfied or not | 2014 | Spain | Cohort | 1 year | 716 | 550 | 166 | 72.5 | 31.4 | NA | NA | NA | NA | NA | NA |
| Pulavarti | 143 | Patients with patella denervation were more satisfied | 4 grades (excellent, good, fair, poor) | 2014 | UK | Randomised controlled trial | 26.4 months | 126 | 58 | 68 | 69.9 | 29.2 | OA | MPP | No | Unknown (CR) | NA | NA |
| Ranawat | 144 | No difference between fixed bearing and rotating platform | VAS (0–10) | 2004 | Italy | Cohort | 46 months | 52 | 9 | 17 | 74.0 | NA | OA, RA | NA | Yes | PFC Sigma (mobile bearing and fixed bearing) (PS) | Yes | NA |
| Ranawat | 145 | No difference between Attune PS and PFC Sigma PS | VAS (0–10) | 2016 | USA | Cohort | 2 years | 200 | 62 | 138 | 70.6 | 29.3 | OA | MPP | Yes | 100 Attune (61 fixed bearing, 39 rotating platform) (PS), 100 PFC Sigma (83 fixed bearing, 17 rotating platform) (PS) | Yes | NA |
| Razmjou | 146 | Patients with neuropathic pain were less satisfied | 6 grades (very satisfied, somewhat satisfied, a little bit satisfied, a little bit dissatisfied, somewhat dissatisfied, very dissatisfied) | 2015 | Netherlands | Cross-sectional | 5 years | 63 | 16 | 47 | 67.0 | NA | OA | NA | NA | NA | NA | NA |
| Roberts | 147 |
(1) Male patients and patients with OA were less satisfied (2) Age had no effect on satisfaction |
Satisfied or not | 2007 | UK | Cross-sectional | 15 years | 912 | NA | NA | 69.5 | NA | OA, RA, other | NA | Yes and No | Freeman-Samuelson, Insall Burstein II, Kinematic, Kinemax, Omnifit, PFC | NA | NA |
| Roberts | 148 | Patients with patellar resurfacing were more satisfied than those without it | 5 grades | 2015 | USA | Randomised controlled trial | 10 years | 327 | 170 | 157 | 70.6 | 29.2 | OA | MPP | Yes and No | PFC Sigma (fixed bearing) (CR) | NA | Spinal |
| Robertsson | 149 |
(1) Women gender, not chronic pain, old age and non-patellar resurfacing negatively related to satisfaction (2) Satisfaction rate was RA > OA > post-trauma arthritis > AVN |
4 grades (very satisfied, satisfied, uncertain, dissatisfied) | 2000 | Sweden | Cross-sectional | 6 years | 27372 | NA | NA | 71.0 | NA | OA RA, ON, other | NA | Yes and no | NA | NA | NA |
| Schlegel | 150 | Patients with surface-cemented tibial component were more satisfied than patients with fully cemented tibial component | 5 grades | 2015 | Germany | Cohort | 11.4 years | 67 | 4 | 63 | 66.0 | NA | RA, OA | MPP | Yes | PFC (fixed bearing) (CR) | Yes (25 surface only, 42 fully cemented) | NA |
| Schnurr | 151 | Patients with mild to moderate OA were less satisfied | 5 grades (completely satisfied, partially satisfied, neutral, partially unsatisfied, completely unsatisfied) | 2013 | Germany | Cohort | 2.8 years | 996 | 338 | 658 | 68.0 | NA | OA | MPP | NA | PFC Sigma, NexGen high-flex | NA | NA |
| Schuster | 152 | Post-operative anterior–posterior stability had no effect on satisfaction | VAS (0–10) | 2011 | Switzerland | Cohort | 47.2 months | 127 | 32 | 80 | 70.7 | 29.3 | NA | NA | NA | balanSys (fixed bearing) (CR) | NA | NA |
| Scott | 153 | Poor OKS, poor pre-operative SF-12 mental component score, depression, back pain and pain in other joints negatively related to satisfaction | 4 grades (very satisfied, satisfied, unsure, dissatisfied) | 2010 | UK | Cohort | 12 months | 1141 | 515 | 698 | 70.1 | NA | OA | NA | No | PFC Sigma (CR), Kinemax (CR), Triathlon (CR) | NA | NA |
| Scott | 154 | In staged bilateral TKR, satisfaction on the first side was not always translated into that of the other side | 4 grades (very satisfied, satisfied, uncertain, dissatisfied) | 2014 | UK | Cohort | 12 months | 70 | 30 | 40 | 71.7 | NA | OA, inflammatory disease | NA | NA | NA | NA | NA |
| Scott | 155 | No difference between TKR for primary OA and post-trauma (tibial plateau fracture) OA | 4 grades (very satisfied, satisfied, uncertain, dissatisfied) | 2015 | UK | Cohort | Minimum 5 years | 124 | 32 | 92 | 66.0 | NA | OA, post-trauma OA (tibial plateau fracture) | MPP | NA | Unknown (CR) | Yes | NA |
| Scott | 156 | Poor pre-operative OKS, poor improvement in OKS and post-operative stiffness (in patients under 55 years) independently predicted dissatisfaction | 4 grades (very satisfied, satisfied, unsure, dissatisfied) | 2016 | UK | Cohort | 12 months | 177 | 78 | 99 | 50.0 | 34.0 | OA, post-trauma OA, inflammatory disease | NA | No | 109 Triathlon (CR), 63 PFC Sigma (CR), 4 Kinemax (CR), 1 hinged implant | NA | NA |
| Senioris | 157 | Patellar congruence had no effect in mobile-bearing TKR | 4 grades (excellent, good, fair, poor) | 2016 | France | Cohort | 14 months | 30 | 8 | 22 | 68.8 | 31.2 | OA | Midvastus | No | HLS KneeTec (mobile bearing) (PS) | No | General |
| Seo | 158 | Octogenarians had same level of satisfaction as young patients | NRS (0–10) | 2015 | South Korea | Cohort | 1 year | 757 | 68 | 689 |
81.9 G1 67.7 G2 |
28.8 | OA | MPP | Yes | NA | Yes | NA |
| Sharkey | 159 | Combination of post-operative noise and numbness negatively related to satisfaction | 5 grades (completely satisfied, partially satisfied, neutral, partially unsatisfied, completely unsatisfied) | 2011 | USA | Cross-sectional | 15 months | 49 | 24 | 25 | 68.0 | 31.6 | OA | NA | NA | NA | NA | NA |
| Shukla | 160 | No difference between MPP and midvastus approach | New KSS (40 points) | 2016 | India | Cohort | 1 year | 52 | 22 | 30 | 61.4 | NA | NA | MPP, midvastus | NA | Genesis II (PS) | NA | NA |
| Singisetti | 161 | No difference between navigation (articular surface mounted (ASM) navigation technique) and conventional technique | 4 grades (very satisfied, somewhat satisfied, somewhat dissatisfied, very dissatisfied) | 2015 | UK | Cohort | 2 years | 355 | 151 | 204 | 67.3 | 30.0 | NA | NA | NA | Triathlon | NA | NA |
| Stickles | 162 | BMI did not relate to satisfaction | 5 grades (very satisfied, somewhat satisfied, neutral, somewhat dissatisfied, very dissatisfied) | 2001 | USA | Cross-sectional | 1 year | 1011 | 374 | 637 | 69.9 | 31.2 | OA | NA | NA | NA | NA | NA |
| Sun | 163 | Patelloplasty is better than traditional patellar management | Original questionnaire | 2012 | China | Cohort | 55 months | 152 | 72 | 80 | 64.7 | NA | OA | MPP | No | PFC Sigma | Yes | NA |
| Thambiah | 164 | Post-operative WOMAC function scores, post-operative WOMAC final scores, improvements in the physical health component of the SF-36 score, and expectations being met were the factors which effect satisfaction | 5 grades (extremely satisfied, satisfied, neutral, dissatisfied, extremely dissatisfied) | 2015 | Singapore | Cohort | 1 year | 110 | 32 | 78 | 64.0 | 26.7 | OA | NA | NA | NA | NA | NA |
| Thomsen | 165 | No difference between standard CR prosthesis and high flexion PS prosthesis | VAS (0–10) | 2013 | Denmark | Randomised controlled trial | 1 year | 66 | 14 | 19 | 67.2 | 29.4 | OA, RA | MPP | Yes | AGC (CR), NexGen LPS-flex (PS) | Yes | Combined (spinal + epidural) |
| Thomsen | 166 | No difference between gender-specific TKR and LPS-flex | VAS (0–10) | 2011 | Denmark | Randomised controlled trial | 1 year | 48 | 0 | 24 | 66 | 29.3 | OA | MPP | NA | Gender Solutions high-flex prosthesis in one knee and a NexGen LPS-flex prosthesis in the other knee | Yes | Spinal |
| Tsukiyama | 167 |
(1) Medial joint laxity made patients less satisfied (2) Lateral joint laxity did not affect satisfaction |
New KSS (40 points) | 2017 | Japan | Cross-sectional | 57 months | 50 | 10 | 31 | 73 | NA | OA | NA | NA | NA | NA | NA |
| van der Ven | 168 | No difference between high-flex prosthesis and conventional prosthesis | VAS (0–10) | 2017 | Netherlands | Randomised controlled trial | 1 year | 48 | 25 | 23 | 65 | 31.5 | OA, RA | NA | NA | NA | NA | NA |
| van de Groes | 169 | Patients with femoral component medial malpositioned more than 5 mm were more satisfied | NRS (0–10) | 2014 | Netherlands | Cross-sectional | 105.6 months | 40 | NA | NA | 75.7 | 31.0 | OA, RA | NA | No | LCS, PFC | NA | NA |
| van Houten | 170 | Patients with post-operative anterior knee pain were less satisfied | VAS (0–10) | 2016 | Netherlands | Cohort | 10 years | 60 | 15 | 45 | 63.7 | NA | OA | NA | No | balanSys (43 fixed bearing, 17 AP-glide bearing) (CR) | NA | NA |
| Vissers | 171 | Pre-operative functional capacity and level of daily activity had no effect on satisfaction | 5 grades (very satisfied, moderately satisfied, neutral, moderately dissatisfied, very dissatisfied) | 2010 | Netherlands | Cross-sectional | 6 months | 44 | 20 | 24 | 63.5 | 30.8 | OA | NA | NA | Genesis II | NA | NA |
| Von Keudell | 172 | Amongst 3 age groups (54 or younger, 55 to 64, 65 or older), 65 or older group tended to be more satisfied than others | NRS (0–10) | 2014 | USA | Cohort | 6.4 years | 245 | 80 | 165 | 62.6 | NA | OA | NA | NA | PFC Sigma | NA | NA |
| Wang | 173 | No difference between post-operative continuous femoral nerve block and patient-controlled epidural analgesia | 4 grades (excellent, good, general, poor) | 2015 | China | Randomised controlled trial | 12 months | 162 | NA | NA | NA | NA | NA | NA | NA | NA | NA | General |
| Waters | 174 | Patients with patellar resurfacing were more satisfied than those without it | 4 grades | 2003 | UK | Randomised controlled trial | 5.3 years | 474 | 157 | 233 | 69.1 | NA | OA, RA, inflammatory disease | MPP | Yes and no | PFC | NA | General |
| White | 175 | Amongst custom prosthesis (iTotal, cemented, CR), PFC Sigma (cemented, PS, fixed bearing) and PFC Sigma (non-cemented, CR, rotating platform), patients with custom prostheses were worst in satisfaction | VAS (0–10) | 2016 | USA | Cohort | 2 years | 74 | 31 | 43 | 52.2 | NA | OA | MPP | NA | iTotal (CR), PFC Sigma (rotating platform) (CR), PFC Sigma (fixed bearing) (PS) | NA | NA |
| Williams | 176 |
(1) Knee Society pain score, OKS, SF-12 (physical/mental), and knee flexion angle positively related to satisfaction (2) Age, BMI, length of stay, gender, diagnosis had no effect on satisfaction |
4 grades (very happy, happy, OK (not perfect), never happy) | 2013 | UK | Cross-sectional | 12 months | 486 | 172 | 314 | 70.9 | 31.1 | OA, RA | NA | NA | LCS (mobile bearing), ROCC (mobile bearing) | NA | NA |
| Wylde | 177 | No difference between fixed bearing and mobile bearing | 4 grades | 2008 | UK | Randomised controlled trial | 2 years | 250 | 110 | 132 | 68.0 | NA | OA, RA | NA | Yes and no | Kinemax plus (fixed bearing, mobile bearing) | NA | NA |
| Yagishita | 178 | Patients with high flexion PS prosthesis were more satisfied than those with high flexion CR prosthesis in simultaneous bilateral TKR | VAS (0–100) | 2012 | Japan | Randomised controlled trial | 5 years | 58 | 4 | 25 | 74.3 | 26.3 | OA | NA | NA | NexGen CR-flex, NexGen LPS-flex | NA | NA |
| Yeung | 179 | There was no relation between BMI and satisfaction | VAS (0–10) | 2011 | Australia | Case–control | 9.2 years | 535 | 230 | 305 | 71.0 | 28.0 | OA | NA | NA | NA | No | NA |
| Zha | 180 | No difference between patients with lateral retinacular release and those without it | 4 grades (very satisfied, satisfied, unsure, dissatisfied) | 2014 | China | Randomised controlled trial | 18 months | 139 | 46 | 93 | 68.2 | 24.0 | OA | MPP | No | Gemini MK II (mobile bearing) | Yes | General |
| Zha | 181 | Chondromalacia patellae did not influence satisfaction | 4 grades (very satisfied, satisfied, unsure or dissatisfied) | 2017 | China | Case series | 36 months | 290 | 123 | 167 | 67.7 | 25.0 | OA | MPP | No | LCS mobile bearing | Yes | NA |
Age are shown in years (mean). Body mass index are shown in kg/m2 (mean). Full information of the studies are listed in Electronic Supplementary Material 1