Table 2.
Risk of radiographic progression by sex-specific quadriceps torque group, stratified by knee alignment
| Sex-specific torque group | Progressors n (%) | Crude RR (CI) | Adjusted a RR (CI) |
|---|---|---|---|
| Neutral alignment | |||
| Low | 226 (33) | 1.16 (1.01–1.36) | 1.03 (0.78–1.40) |
| Middle | 241 (36) | 1.18 (1.02–1.37) | 1.12 (0.96–1.30) |
| High | 209 (31) | 1.00 | 1.00 |
| Malalignment b | |||
| Low | 253 (33) | 1.13 (0.99–1.28) | 1.00 (0.87–1.14) |
| Middle | 256 (34) | 1.05 (0.93–1.20) | 0.99 (0.86–1.12) |
| High | 246 (33) | 1.00 | 1.00 |
RR: relative risk; CI: 95% confidence interval.
aAdjusted for baseline Kellgren–Lawrence grade, baseline WOMAC
pain, age, body mass index, sex, and alignment.
bMalalignment defined as ≥2° varus or valgus malalignment.