Table 1.
Characteristics of the study participants at enrolment on the waiting lists for total knee replacement (n = 197)
| Variables | n (%) | Mean (SD) |
| Demographics | ||
| Age (years) | 67 (9.8) | |
| Gender | ||
| Female | 126 (64) | |
| Male | 71 (36) | |
| Marital status | ||
| Single, separated, divorced or widowed | 72 (37) | |
| Married or common law | 125 (63) | |
| Living situation | ||
| Living alone | 45 (23) | |
| Not living alone | 152 (77) | |
| Clinical characteristics | ||
| BMI* (kg/m2) | 31.0 (6.3) | |
| Comorbidities** (/56) | 6.2 (2.3) | |
| Duration of symptoms (years) | 8.5 (8.8) | |
| Contralateral knee pain† | ||
| Yes | 53 (27) | |
| No | 144 (73) | |
| Use of a walking aid | ||
| Yes | 74 (38) | |
| No | 123 (62) | |
| Socioeconomic characteristics | ||
| Educational level (part or complete) | ||
| High school or less | 112 (57) | |
| College or university | 85 (43) | |
| Employment status | ||
| Retired | 128 (65) | |
| Employed | 39 (20) | |
| Not working or sickness benefit | 30 (15) | |
| Household income‡ | ||
| < $30 000/year | 61 (36) | |
| ≥ $30 000/year | 107 (64) | |
| Psychosocial characteristics | ||
| Psychological distress (/42) | 6.9 (6.5) | |
| Social support§ | ||
| Low | 92 (47) | |
| High | 105(53) |
* Body mass index
** Cumulative illness rating scale (CIRS); n = 177
† Established from the WOMAC pain score for the contralateral knee
‡ n = 168
§ Social support was dichotomized around the median score: Low (≤ 80) and High (> 80)