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Table 2 BMI category and OA grade counts, 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

  n Pain (N = 329) No Pain (N = 247)
Normal BMIb 155 66 89
Pre-Obese 208 113 95
Obese I 119 75 44
Obese II 61 47 14
Obese III 33 28 5
RKOA Grade 2 331 155 176
RKOA Grade 3 150 100 50
RKOA Grade 4 95 74 21
  1. a Kellgren and Lawrence scale for radiographic osteoarthritis (Grades 2+).
  2. b BMI = body mass index (kg/m2) WHO Classification: Normal 18.5–24.9; Pre-Obese 25.0–29.9; Obese I 30.0–34.9; Obese II 35.0–39.9; and Obese III 40.0 +.