Unadjusted analysis of the demographic characteristics and outcome data for patients who lived with another person and those who lived alone
| Characteristic | Living status; mean (SD)* | p value | |
|---|---|---|---|
| Living alone, n = 395 | Living with someone, n = 1327 | ||
| Overall, % | 22.9 | 77.1 | < 0.001 |
| Male, % | 14.1 | 85.9 | |
| Female, % | 29.3 | 70.7 | |
| Age, yr | 73.9 (11.1) | 68.4 (11.8) | < 0.001 |
| BMI, kg/m2 | 30.0 (7.7) | 30.3 (6.2) | 0.42 |
| Charlson Index, score (%) | |||
| 0 | 194 (49.1) | 742 (55.9) | 0.04 |
| 1 | 119 (30.1) | 383 (28.9) | |
| 2 | 54 (13.7) | 133 (10.0) | |
| ≥ 3 | 28 (7.1) | 69 (5.2) | |
| Mental component score | 61.4 (18.2) | 60.8 (18.1) | 0.78 |
| WOMAC score | |||
| Before surgery | |||
| Total | 57.1 (28.3) | 51.8 (17.0) | < 0.001 |
| Pain | 11.0 (3.4) | 10.5 (3.8) | < 0.001 |
| Function | 44.8 (12.0) | 41.3 (13.8) | 0.02 |
| 3 months after surgery | |||
| Total | 27.9 (15.1) | 24.4 (15.5) | 0.001 |
| Pain | 5.5 (4.5) | 4.5 (3.6) | < 0.001 |
| Function | 23.0 (12.2) | 20.1 (12.5) | < 0.001 |
| 1 year after surgery | |||
| Total | 24.6 (19.3) | 19.9 (15.2) | < 0.001 |
| Pain | 5.1 (3.5) | 3.8 (3.1) | < 0.001 |
| Function | 18.6 (11.3) | 16.0 (11.6) | < 0.001 |
BMI = body mass index; SD = standard deviation; WOMAC = Western Ontario McMaster University Osteoarthritis Index.
↵* Unless otherwise indicated.