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Table 1 Baseline characteristic of participants

From: Popliteal cysts and subgastrocnemius bursitis are associated with knee symptoms and structural abnormalities in older adults: a cross-sectional study

Characteristic Without popliteal cyst (n = 795) With popliteal cyst (n = 105) P
Age, years 62.2 (7.3) 63.2 (8.0) 0.18*
Female gender, % 49.9 47.6 0.65
Body mass index, kg/m2 27.6 (4.5) 27.9 (4.9) 0.53*
WOMAC knee pain    
Weight-bearing, 0 to 27 mm 4.7 (4.9) 5.8 (5.0) 0.03*
Non-weight-bearing, 0 to 18 mm) 3.2 (4.7) 3.1(4.7) 0.95*
Total pain, (0 to 45 mm 5.1 (5.0) 6.0 (4.9) 0.07*
Prevalence of bone marrow lesions, % 34.0 40.0 0.23
Prevalence of osteophytes, % 8.2 16.2 0.01
Medial tibiofemoral JSN, % 52.6 54.5 0.30
Lateral tibiofemoral JSN, % 23.4 27.3 0.34
Cartilage defect, ≥2, %    
Medial tibial 20.4 80.4 <0.001
Lateral tibial 15.3 28.6 0.01
Medial femoral 19.7 31.4 <0.001
Lateral femoral 9.6 15.2 0.01
Patellar 38.9 49.5 0.01
Effusion, WORMS ≥1, % 25.9 30.5 0.56
Subgastrocnemius bursitis, grade ≥1, % 9.7 36.2 <0.001
  1. Results presented as mean (SD) except for percentages. Data in bold denote statistically significant results. JSN, joint space narrowing; WOMAC, Western Ontario McMaster Universities osteoarthritis index; WORMS, whole-organ magnetic resonance imaging score; *t-tests; others were χ2 tests.