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Table 1 Characteristics of the sample population

From: Quantification of hip effusion-synovitis and its cross-sectional and longitudinal associations with hip pain, MRI findings and early radiographic hip OA

Characteristics Small or no hip effusion-synovitis (N = 63) Moderate or large hip effusion-synovitis (N = 133) P-value
Age (yrs): mean (SD) 63.4 (4.88) 64.6 (4.97) 0.04
Male sex (%) 46% (29/63) 44% (58/133) 0.75
BMI (kg/cm2): mean (SD) 27.2 (3.11) 28.0 (3.10) 0.02
Hip pain
 Presence 33% (19/63) 44% (58/133) 0.04
 Severity: mean (SD) 1.82 (5.41) 1.81 (5.45) 0.98
High cartilage signal 52% (33/63) 59% (77/133) 0.20
Presence of any bone marrow lesions (BMLs) 21% (13/63) 15% (20/133) 0.12
Hip cartilage defects
 Femoral defects 54% (34/63) 57% (75/133) 0.69
 Acetabular defects 68% (42/63) 65% (86/133) 0.61
 Any hip defects 71% (44/63) 71% (94/133) 0.92
Presence of radiographic hip OA (ROA) 44% (27/63) 50% (66/133) 0.59
  1. The variable small or no hip effusion-synovitis includes participants with hip effusion-synovitis less than 0.77 cm2 and the variable moderate/large hip effusion includes participants with effusion-synovitis more than equal to 0.77 cm2
  2. Data presented as means (SD) and proportions
  3. Bold indicates statistically significant results (p < 0.05)