Table 2.
Patient characteristics of included studies
| Author | Number of knees (patients) | Mean follow-up(SD) | Mean age (SD)(years) | Diagnosis (%) | Gender (%) | BMI (SD) | MCMS | ||
|---|---|---|---|---|---|---|---|---|---|
| OA | RA | Female | Male | ||||||
| Conventional PS group (N= 2104 knees) | |||||||||
| Maloney and Schurman [38] | 53 (37) | 21 mo | 68 | 65 | 24 | 62 | 38 | N/S | 53 |
| Parsley et al. [26] | 121 (121) | Minimal 1 y | 68.2 (9.8) | 99.2 | 0.8 | 69 | 31 | 29.3 (5.6) | 49 |
| Malik et al. [14] | 50 (50) | 1 y | 67.1 (9.9) | 98 | 2 | 76 | 24 | 33.0 (6.6) | 41 |
| Nutton et al. [13] | 28 (28) | 1 y | 68 | 100 | 0 | 57 | 43 | N/S | 86 |
| Cheng et al. [28] | 144 (144) | 12 y | 70.1 | 100 | 0 | N/S | N/S | 67 | |
| McCalden et al. [29] | 1177 (1177) | 5.4 y (minimal 1 y) | 67.82 (9.66) | 91 | 0 | 58 | 42 | 32.12 (5.15) | 69 |
| Chaudhary et al. [30] | 38 (38) | 22.7 (5.2) mo | 70.2 (8.4) | Noninflammatory arthritis | 45 | 55 | 30.9 (4.3) | 86 | |
| Tanzer et al. [31] | 20 | 2 y | 66 | 90 | 10 | 80 | 20 | 29.9 | 63 |
| Wohlrab et al. [32] | 30 (30) | 5 y | 66.52 (9.05) | Degenerative arthritis | 70 | 30 | 24.4 (6.6) | 64 | |
| Victor et al. [33] | 7 | 21 (2) mo | 70 (3) | 100 | 0 | N/S | N/S | 32.7 | 69 |
| Gioe et al. [27] | 136 | 42 (14.2) mo | 72.62 (7.2) | 96 | 2 | 4 | 96 | 31.51 (6.7) | 92 |
| Bin and Nam [16] | 90 | 1 y | 66.3 (6.6) | Degenerative arthritis | 97 | 3 | 27.7 (4.4) | 64 | |
| Maruyama et al. [35] | 20 (20) | 30.6 mo | 74.3 | 100 | 0 | 60 | 40 | N/S | 58 |
| Hasegawa et al. [36] | 25 (25) | 40 mo | 73 | 100 | 0 | 88 | 12 | 25.21 | 70 |
| Ng et al. [12] | 35 (35) | 35 mo | 68 | 100 | 0 | 80 | 20 | N/S | 33 |
| Bozic et al. [39] | 130 (105) | 5.9 (0.7) mo | 65.8 (10.3) | 90.4 | 5.1 | 74.3 | 25.7 | 30.8 | 62 |
| High-flexion PS group (N= 518 knees) | |||||||||
| Malik et al. [14] | 50 (50) | 1 y | 65.1 (9.9) | 100 | 0 | 76 | 24 | 32.6 (5.6) | 41 |
| Nutton et al. [13] | 28 (28) | 1 y | 71 | 100 | 0 | 39 | 61 | N/S | 86 |
| McCalden et al. [29] | 197 (197) | 5.4 y (minimal 1 y) | 65.93 (10.54) | 90 | 0 | 57 | 43 | 32.71 (7.25) | 69 |
| Zeh et al. [34] | 63 (63) | 16.25 (7) mo | 68 (9.8) | 100 | 0 | N/S | N/S | 31.2 (4.9) | 61 |
| Bin and Nam [16] | 90 | 1 y | 66.6 (7.7) | Degenerative arthritis | 93 | 7 | 27.0 (4.2) | 64 | |
| Ng et al. [12] | 35 (35) | 35 mo | 68 | 100 | 0 | 80 | 20 | N/S | 33 |
| Watanabe et al. [37] | 28 (25)a | 2.6 y | 71 | 84 | 16 | 80 | 20 | 28.1 (4.3) | 56 |
| 27 (23)b | 2.8 y | 71 | 74 | 26 | 74 | 26 | 26.3 (4.2) | ||
| Overall mean(SD) | 29.5 (19.0) mo | 68.7 (2.5) y | 93.9 (9.7)% | 67.6 (20.7)% | 29.7 (2.8) | 63.5 (14.9) | |||
OA osteoarthritis, RA rheumatoid arthritis, N/S not stated, MCMS modified Coleman methodology score, SD standard deviation, BMI body mass index
a Minimally invasive surgery (MIS) approach
b Conventional approach