Table 2.
Associations of baseline BW-normalized hip abductor strength (per 0.1 Nm/kg) with baseline-to-2-year tibiofemoral and patellofemoral cartilage damage worsening outcomes [Relative Risk (95% CI)] (n = 275 knees from 164 persons)
| Baseline Hip Abductor Strength (Nm/kg) | Any TF | Medial TF | Lateral TF | Any PF | Medial PF | Lateral PF |
|---|---|---|---|---|---|---|
| Number of knees (%) with poor outcome | 65 (23.6) | 38 (13.8) | 30 (10.9) | 46 (16.7) | 27 (9.8) | 23 (8.4) |
| Unadjusted | 0.92 (0.84, 1.01) | 0.95 (0.84, 1.08) | 0.84* (0.73, 0.97) | 0.90 (0.78, 1.04) | 0.83* (0.70, 0.99) | 0.94 (0.78, 1.13) |
| Adjusteda | 0.94 (0.86, 1.04) | 0.95b (0.84, 1.08) | 0.83*b (0.71, 0.98) | 0.88 (0.75, 1.02) | 0.80* (0.67, 0.95) | 0.92 (0.75, 1.13) |
Abbreviations: BW, body weight; CI, confidence interval; TF, tibiofemoral; PF, patellofemoral; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index; K/L, Kellgren/Lawrence
*
Relative risk (RR) with associated 95% CI that excludes 1.0 was considered to be statistically significant
a
Adjusted for age, sex, WOMAC pain, and K/L grade
b
Adjusted for age and sex. Models became unstable when adjusting for age, sex, WOMAC pain, and K/L grade