Table 1.
Selected characteristics of the participants who underwent primary unilateral total knee arthroplasty surgery n = 141
| Variables considered for PR development | n (%) | Mean (SD) | Other collected variables | n (%) | Mean (SD) |
|---|---|---|---|---|---|
| Demographics | Pre-surgery wait | ||||
| Age (years) | 66 (9.5) | Time between enrolment on wait list and surgery (days)* | 184 (120.8) | ||
| Female | 93 (66) | Categories of wait time | |||
| Marital status | ≤3 months | 30 (21) | 62.5 (16.9) | ||
| Single, separated, divorced or widowed | 51 (36) | >3-6 months | 53 (38) | 130.2 (28.7) | |
| Married or common law | 90 (64) | >6-9 months | 31 (22) | 216.8 (25.1) | |
| Living alone | 34 (24) | >9 months | 27 (19) | 386.3 (56.7) | |
| Socioeconomic characteristics | Surgery postponed for personal reasons | 9 (6) | |||
| Educational level (part or complete) | Surgical characteristics | ||||
| High school or less | 79 (56) | Implant type | |||
| College or University | 62 (44) | Postero-stabilized | 115 (82) | ||
| Employment status | Cruciate retaining | 26 (18) | |||
| Unemployed or retired | 108 (77) | Implant fixation | |||
| Employed | 33 (23) | Cementless | 4 (3) | ||
| Household income** | Hybrid | 2 (1) | |||
| < $30 000 / year | 48 (34) | Cemented | 135 (96) | ||
| $30 000 - $59 999 / year | 43 (31) | Implant bearing type | |||
| ≥ $60 000 / year | 34 (24) | Mobile | 4 (3) | ||
| Missing data | 16 (11) | Fixed | 137 (97) | ||
| Psychosocial characteristics | Patella resurfacing | 132 (93) | |||
| Psychological distress (/42) | 7.2 (7.0) | In-hospital complications‡ | |||
| Social support° | 0 | 109 (77) | |||
| Low | 67 (48) | 1 | 23 (16) | ||
| High | 74 (52) | ≥2 | 10 (7) | ||
| Clinical characteristics | Health services utilization | ||||
| Diagnosis | Hospital length of stay (days) | 7.5 (3.0) | |||
| Osteoarthritis | 136 (96) | Discharged directly home | 123 (87) | ||
| Rheumatoid arthritis | 5 (4) | Post-surgery community physiotherapy (hours) | 14.7 (18.7) | ||
| BMI¬ (kg/m2) | 31.2 (6.2) | ||||
| Comorbidities (/56) | 6.5 (2.2) | ||||
| Duration of knee symptoms before enrolment† (years) | 7.9 (8.1) | ||||
| Contralateral knee pain§ | 101 (72) | ||||
| Use of a walking aid | |||||
| At enrolment on wait list | 55 (39) |
SD: standard deviation.
*Median (range): 148 days (32–692).
**n = 125 – CND $.
°Social support was dichotomized around the median score: Low (≤80) and High (>80).
¬Body mass index.
†n = 138.
§WOMAC pain score at enrolment on pre-surgery wait list dichotomized into presence or absence of contralateral knee pain.
‡In-hospital complications including: wound infection, dislocation, knee ankylosis and manipulation, cardiovascular/pulmonary/circulatory complications, peripheral/central nervous system involvement, urinary infection, acute confusion, tendon and ligament rupture or blood transfusion.