Table 2 Association between patellar alignment (fore groups) and adjusted means of lateral PF joint space narrowing
Measure | Â | Lateral joint space narrowing | p for trend | |||
|---|---|---|---|---|---|---|
| Â | Quartile... | 1 | 2 | 3 | 4 | Â |
PLR | No. of knees | 50 | 50 | 50 | 52 | Â |
|  | Range of PLR | 0.66–0.87 | 0.88–0.98 | 0.98–1.12 | 1.13–1.71 |  |
|  | OR (95% CI) | 1.00 | 1.56 (0.66–3.67) | 1.36 (0.57–3.23) | 2.77 (1.20–6.39) | Linear, 0.0136; U-shaped, 0.1630 |
SA | No. of knees | 51 | 52 | 49 | 50 | Â |
|  | Range of SA | 98–113 | 114–119 | 120–124 | 125–155 |  |
|  | OR (95% CI) | 1.00 | 1.48 (0.66–3.33) | 1.58 (0.71–3.56) | 1.43 (0.63–3.24) | Linear, 0.1206; U-shaped, 0.6204 |
LPTA | No. of knees | 52 | 51 | 44 | 54 | Â |
|  | Range of LPTA | -25 to 13 | 14–17 | 18–21 | 22–35 |  |
|  | OR (95% CI) | 1.00 | 0.46 (0.21–0.97) | 0.32 (0.14–0.73) | 0.10 (0.04–0.27) | Linear, <0.0001; U-shaped, 0.9073 |
BO | No. of knees | 49 | 49 | 51 | 50 | Â |
|  | Range of BO | 38.46–54.55 | 54.76–60.42 | 60.47–66.67 | 66.67–100 |  |
|  | OR (95% CI) | 1.00 | 2.16 (0.78–5.96) | 4.22 (1.58–11.25) | 8.26 (3.06–22.30) | Linear, <0.0001; U-shaped, 0.2468 |