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Table 1 Baseline characteristics of the study population

From: Knee complaints seen in general practice: active sport participants versus non-sport participants

   Athletes (n = 421) Non-athletes (n = 388) OR (95%CI) p-value
Age (years) Mean (SD) 41.0 (16.7) 50.0 (15.9)   < 0.001
Gender (male) N (%) 244 (58.0%) 196 (50.5%)   0.034
BMI (kg/m2) Mean (SD) 25.2 (4.1) 27.6 (4.9)   < 0.001
Functional disability      
WOMAC score Mean (SD) 74.5 (19.5) 66.6 (21.1)   < 0.001
Pain (VAS) Mean (SD) 4.20 (2.15) 4.46 (2.19)   < 0.001
Type of knee complaints*
Trauma N (%) 147 (34.9%) 111 (28.6%) 0.83 (0.60–1.14) 0.26
Bilateral N (%) 19 (4.5%) 13 (3.4%) 0.96 (0.74–1.25) 0.76
Recurrent complaints N (%) 159 (37.8%) 165 (42.5%) 0.84 (0.62–1.13) 0.24
Working diagnoses GP*
General knee complaints N (%) 138 (32.8%) 138 (35.6%) 0.93 (0.68–1.26) 0.62
Jumper's knee N (%) 37 (8.8%) 38 (9.8%) 0.75 (0.46–1.24) 0.27
Acute distortion N (%) 37 (8.8%) 20 (5.2%) 1.92 (1.04–3.53) 0.04
Osteoarthritis N (%) 21 (5.0%) 49 (12.6%) 0.74 (0.42–1.33) 0.32
Osgood-Schlatter N (%) 7 (1.7%) 1 (0.3%) 1.87 (0.22–16.1) 0.57
Acute meniscus/ligament rupture N (%) 21 (5.0%) 17 (4.4%) 1.13 (0.57–2.25) 0.73
Chronic internal trauma N (%) 45 (10.7%) 24 (6.2%) 1.66 (0.97–2.85) 0.07
Patellofemoral pain syndrome N (%) 52 (12.4%) 37 (9.5%) 0.87 (0.54–1.40) 0.56
Chronic meniscus fracture N (%) 5 (1.2%) 10 (2.6%) 0.54 (0.18–1.68) 0.29
  1. * Analyses adjusted for gender, age and BMI. Significant differences are printed bold.
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