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Table 3 Association between baseline risk factors and worsening of knee pain

From: Association between ultrasound-detected synovitis and knee pain: a population-based case–control study with both cross-sectional and follow-up data

  Descriptive OR (95% CI)
Stable/improved Worsened Crude Age, gender, BMI-adjusted
N 192 63   
Effusion
 Mean (SD) (mm) 4.24 (3.44) 6.20 (4.09) 1.15 (1.06–1.24) 1.11 (1.02–1.20)
 Effusion ≥ 4 mm, n (%) 79 (41.58) 40 (63.49) 2.44 (1.36–4.40) 1.95 (1.05–3.64)
Synovial hypertrophy
 Mean (SD) (mm) 2.06 (2.89) 3.35 (3.35) 1.14 (1.04–1.24) 1.09 (0.99–1.20)
 Thickness ≥ 4 mm, n (%) 45 (23.68) 24 (38.10) 1.98 (1.08–3.64) 1.40 (0.72–2.74)
Power Doppler signal, n (%) 8 (4.17) 1 (1.59) 0.37 (0.05–3.03) 0.47 (0.06–4.02)
Global radiographic score (0–-60), mean (SD) 5.81 (7.19) 13.58 (9.40) 1.11 (1.07–1.15) 1.10 (1.06–1.14)
Radiographic OA, n (%) 44 (23.16) 39 (62.90) 5.63 (3.04–10.41) 4.73 (2.46–9.10)
Quadriceps strength (kg, lowest tertile) 66 (34.74) 34 (53.97) 2.20 (1.24–3.93) 1.89 (1.04–3.46)
  1. Significant associations are highlighted in bold
  2. BMI body mass index, CI confidence interval, OA osteoarthritis, OR odds ratio, SD standard deviation