Multivariable log-binomial regression results and comparison of covariates for participants who developed incident ROA over the 24-month study period compared with those who did not (n = 1460 participants, 2638 observations). Values are mean (SD) unless otherwise indicated.
| Variable | Incident ROA | No ROA | RR | 95% CI | ||
|---|---|---|---|---|---|---|
| n | Value | n | Value | |||
| Walking speed | 122 | −0.0121 (0.1188) | 2516 | 0.0016 (0.1335) | 1.08 | 1.00–1.15 |
| Age, yrs | 122 | 59.3 (8.4) | 2516 | 59.0 (9.0) | 1.00 | 0.98–1.03 |
| BMI, kg/m2 | 122 | 28.3 (4.9) | 2516 | 27.0 (4.4) | 2.03 | 1.33–3.10 |
| PASE score | 122 | 162.7 (87.5) | 2501 | 166.5 (82.0) | 1.00 | 1.00–1.00 |
| Knee injury, n (%) | 122 | 8 (6.5) | 2513 | 67 (2.7) | 1.38 | 0.76–2.49 |
ROA: radiographic osteoarthritis; RR: risk ratio; BMI: body mass index; PASE: Physical Activity Scale for the Elderly.