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Table 1 The effect of demographic characteristics on clinically relevant variation in pain over two years*

From: The effect of patient characteristics on variability in pain and function over two years in early knee osteoarthritis

  KOOS Pain SF-36 Bodily Pain
Characteristic Prevalence of clinically relevant change Unadjusted for baseline values Adjusted for baseline values Prevalence of clinically relevant change Unadjusted for baseline values Adjusted for baseline value
  N % OR OR 95% CI N % OR OR 95% CI
Age
   <46† 11/49 22     27/49 55    
   46–56 17/47 36 1.5 1.1 0.4–3.1 32/47 68 1.2 1.1 0.4–2.8
   >56 12/47 26 1.0 0.9 0.3–2.4 34/47 72 1.9 1.7 0.7–4.5
Gender
   men† 35/120 29     78/120 65    
   women 5/23 22 1.2 0.5 0.2–1.8 15/23 65 1.2 1.1 0.4–3.2
BMI (kg/m2)
   <25† 10/61 16     34/61 56    
   25–29.9 22/64 34 2.4 2.0 0.8–4.9 47/64 73 2.3 1.9 0.8–4.3
   ≥30 7/16 44 4.0 1.8 0.4–7.1 11/16 69 1.4 0.6 0.2–2.5
  1. KOOS = Knee injury and Osteoarthritis Outcome Score, OR = odds ratio, 95% CI = 95% confidence interval, BMI = body mass index.
  2. * All risk factors listed are entered simultaneously in each model.
  3. † Reference category.