Table 2 Kappa coefficient and confidence intervals of 95% (in parentheses) for overweight diagnosis (overweight + obesity) according to three criteria for BMI classification among Brazilian adolescents

11-12

Male

0.84 (0.83-0.86)^†‡

0.62 (0.60-0.64)

0.75 (0.74-0.77)^†

Female

0.67 (0.65-0.69)

0.72 (0.68-0.74)

0.89 (0.88-0.90)*^†

All

0.76 (0.75-0.77)^†

0.66 (0.64-0.67)

0.82 (0.81-0.83)*^†

13-14

Male

0.81 (0.79-0.83)^†

0.71 (0.69-0.73)

0.85 (0.83-0.86)^†

Female

0.78 (0.76-0.81)

0.78 (0.75-0.80)

0.93 (0.91-0.94)*^†

All

0.80 (0.78-0.81)^†

0.74 (0.72-0.76)

0.88 (0.87-0.89)^*†

15-17

Male

0.80 (0.77-0.83)

0.82 (0.78-0.84)

0.83 (0.80-0.85)

Female

0.94 (0.92-0.96)^†

0.88 (0.85-0.91)

0.93 (0.91-0.95)

All

0.86 (0.84-0.88)

0.84 (0.82-0.86)

0.87 (0.85-0.89)

All

Male

0.82 (0.81-0.83)^†

0.68 (0.67-0.69)

0.80 (0.79-0.81)^†

Female

0.74 (0.73-0.75)

0.76 (0.75-0.77)

0.91 (0.90-0.92)*^†

All

0.79 (0.78-0.80)^†

0.72 (0.71-0.72)

0.85 (0.84-0.86)*^†