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Table 3 Association between body mass index and knee pain 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

   Unadjusted Adjustedd
BMIb (n) ORc 95% CI OR 95% CI
Pre-Obese (208) 1.6 * 1.1 – 2.4 1.6* 1.0 – 2.5
Obese I (119) 2.3 ** 1.4 – 3.8 2.0** 1.2 – 3.4
Obese II (61) 4.5*** 2.3 – 8.9 3.9** 1.8 – 8.3
Obese III (33) 7.8 *** 2.8 – 20.6 7.5** 2.5 – 22.6
  1. * P < 0.05; ** P < 0.01; *** P < 0.0001.
  2. a Kellgren and Lawrence scale for radiographic osteoarthritis (Grades 2+).
  3. b BMI Body Mass Index (kg/m2) WHO Classification: Pre-Obese 25.0–29.9; Obese I 30.0–34.9; Obese II 35.0–39.9; and Obese III 40.0 +.
  4. c OR = odds ratio. Referent group for all odds ratios is Normal BMI 18.5–24.9 (n = 155).
  5. d Adjusted odds ratio models: [Pain = BMI + age + gender + RKOA grade].