Table 2.

Agreement between weight status reported as the kappa coefficient (κ) and 95% confidence interval across the three reference systems

	All (n = 10,646)	Girls (n = 5,594)	Boys (n = 5,052)
IOTFa versus WHOb	0.59 (0.58–0.61)	0.63 (0.61–0.65)	0.55 (0.53–0.57)
IOTFa versus FINc	0.74 (0.73–0.76)	0.68 (0.65–0.70)	0.82 (0.80–0.83)
WHOb versus FINc	0.64 (0.62–0.65)	0.57 (0.55–0.60)	0.70 (0.68–0.72)

^aIOTF [2, 3].

^bWHO [4].

^cFIN [7].