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Table 2 Agreements between weight status based on IOTF, CDC and WHO classification systems

From: Overweight and obesity prevalence among Cree youth of Eeyou Istchee according to three body mass index classification systems

  CDC  
IOTF Normal weight Overweight Obese Total
 Normal weight 95 (32.99%) 0 0 95
 Overweight 6 (2.08%) 51 (17.71%) 13 (4.51%) 70
 Obese 0 0 123 (42.71%) 123
Total 101 51 136 288
  WHO  
IOTF Normal weight Overweight Obese Total
 Normal weight 90 (31.25%) 5 (1.74%) 0 95
 Overweight 1 (0.35%) 50 (17.36%) 19 (6.60%) 70
 Obese 0 0 123 (42.71%) 123
Total 91 55 142 288
  CDC  
WHO Normal weight Overweight Obese Total
Normal weight 91 (31.60%) 0 0 91
Overweight 10 (3.47%) 45 (15.63%) 0 55
Obese 0 6 (2.08%) 136 (47.22%) 142
Total 101 51 136 288
  1. % of agreement = 91.32%; κw = 0.91, 95% CI: 0.87–0.94; P < 0.001
  2. % of agreement = 94.45%; κw = 0.94, 95% CI: 0.91–0.97; P < 0.001
  3. % of agreement was calculated by adding concordant percentages
  4. CDC Centers for Disease Control and Prevention; CI confidence interval; IOTF International Obesity Task Force; κw weighted Kappa; WHO World Health Organization