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Table 4 Association between patella alignment (fore groups) and adjusted means of lateral patellar osteophytes

From: The association between patellar alignment on magnetic resonance imaging and radiographic manifestations of knee osteoarthritis

Measure   Lateral patellar osteophytes p for trend
  Quartile... 1 2 3 4  
PLR No. of knees 100 100 100 104  
  Range of PLR 0.66–0.87 0.88–0.98 0.98–1.12 1.13–1.71  
  OR (95% CI) 1.00 1.70 (1.01–2.86) 1.23 (0.73–2.08) 1.67 (0.98–2.84) Linear, 0.0138; U-shaped, 0.0943
SA No. of knees 102 104 98 100  
  Range of SA 98–113 114–119 120–124 125–155  
  OR (95% CI) 1.00 1.62 (0.97–2.71) 1.83 (1.09–3.08) 1.52 (0.91–2.55) Linear, 0.0804; U-shaped, 0.8875
LPTA No. of knees 104 102 88 108  
  Range of LPTA -25 to 13 14–17 18–21 22–35  
  OR (95% CI) 1.00 0.35 (0.21–0.60) 0.51 (0.30–0.88) 0.29 (0.17–0.49) Linear, <0.0001; U-shaped, 0.1076
BO No. of knees 98 98 102 100  
  Range of BO 38.46–54.55 54.76–60.42 60.47–66.67 66.67–100  
  OR (95% CI) 1.00 0.92 (0.54–1.54) 1.33 (0.79–2.25) 3.07 (1.77–5.34) Linear, <0.0001; U-shaped, 0.2038
  1. Results are adjusted for age, sex and bone mass index. PLR, patellar length ratio; SA, sulcus angle; LPTA, lateral patellar tilt angle; BO, bisect offset; OR, odds ratio; CI, confidence interval.