Cumulative incidence and progression of PFJOA and TFJOA and the inter-relationship
| n (%) | Crude OR (95% CI) | Adjusted OR* (95% CI) | |
|---|---|---|---|
| Cumulative incidence of PFJOA | 47/163 (28.8) | ||
| Stratified by severity of TFJOA at baseline | |||
| None | 37/144 (25.7) | 1 | 1 |
| Mild TFJOA | 5/14 (35.7) | 3.2 (1.2 to 8.5) | 3.1 (1.2 to 8.4) |
| Moderate/severe TFJOA | 5/5 (100) | ||
| Cumulative progression of PFJOA | 36/190 (18.9) | ||
| Stratified by severity of TFJOA at baseline | |||
| None | 7/84 (8.3) | 1 | 1 |
| Mild TFJOA | 10/41 (24.4) | 4.1 (1.7 to 10.0) | 4.5 (1.8 to 11.2) |
| Moderate/severe TFJOA | 19/65 (29.2) | ||
| Cumulative incidence of TFJOA | 55/253 (21.7) | ||
| Stratified by severity of PFJOA at baseline | |||
| None | 23/144 (16.0) | 1 | 1 |
| Mild PFJOA | 24/84 (28.6) | 2.2 (1.2 to 4.0) | 2.2 (1.1 to 4.1) |
| Moderate/severe PFJOA | 8/25 (32.0) | ||
| Cumulative progression of TFJOA | 23/91 (25.3) | ||
| Stratified by severity of PFJOA at baseline | |||
| None | 2/14 (14.3) | 1 | 1 |
| Mild PFJOA | 13/41 (31.7) | 2.3 (0.5 to 10.9) | 1.7 (0.3 to 9.0) |
| Moderate/severe PFJOA | 8/36 (22.2) | ||
↵* Adjusted for gender, age, body mass index.
OA, osteoarthritis; PFJOA, patellofemoral joint osteoarthritis; TFJOA, tibiofemoral joint osteoarthritis.