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Table 1 Study sample demographics by pain status among subjects (N = 576) with radiographic knee osteoarthritisa

From: The association of BMI and knee pain among persons with radiographic knee osteoarthritis: A cross-sectional study

  Pain (N = 329) No Pain (N = 247)
Age mean (SD) 67.1 (9.0) 66.8 (10.7)
Age minimum 40.0 40.0
Age maximum 89.0 89.0
BMIb‡ mean (SD) 30.4 (6.4) 27.5 (4.9)
BMI minimum 18.9 18.9
BMI maximum 65.6 46.6
Female (%) 71.1 60.3
High-risk occupation (%) 33.1 32.4
Education (no high school) (%) 10.1 11.0
Diabetes (%) 1.2 0.8
Heart disease (%) 8.2 9.7
Stroke (%) 4.3 2.8
  1. a Kellgren and Lawrence scale for radiographic osteoarthritis (Grades 2+).
  2. b BMI = body mass index (kg/m2).
  3. P < 0.01; P < 0.0001