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Table 5 Association between patella alignment (fore groups) and adjusted means of medial patellar osteophytes

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

Measure   Medial 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 1.27 (0.75–2.15) 1.16 (0.68–1.96) 1.12 (0.66–1.90) Linear, 0.5996
SA No. of knees 102 104 98 100  
  Range of SA 98–113 114–119 120–124 125–155  
  OR (95% CI) 1.00 1.465 (0.87–2.43) 1.73 (1.03–2.93) 1.69 (1.01–2.83) Linear, 0.0514
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 0.80 (0.48–1.35) 0.93 (0.55–1.60) 1.43 (0.85–2.39) Linear, 0.1080
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 0.887 (0.346–2.272) 0.711 (0.272–1.857) 0.189 (0.057–0.638) Linear, 0.888
  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.