Table 3.

Interrater agreement for child weight category^a calculated using parent-reported versus researcher-measured child height and weight.

Time point and parent-reported data		Calculated from researcher-measured data
		Intervention groupb				Control groupc
		Healthy weight	Overweight	Obese	Total	Healthy weight	Overweight	Obese	Total
Baseline, n (%)		n=28				n=14
	Healthy weight	4 (14)	1 (4)	0 (0)	5 (18)	2 (14)	0 (0)	0 (0)	2 (14)
	Overweight	3 (11)	6 (21)	3 (11)	12 (43)	0 (0)	2 (14)	2 (14)	4 (29)
	Obese	1 (4)	0 (0)	10 (36)	11 (39)	1 (7)	0 (0)	7 (50)	8 (57)
	Total	8 (29)	7 (25)	13 (46)	28 (100)	3 (21)	2 (14)	9 (64)	14 (100)
Week 12, n (%)		n=19d				n=14
	Healthy weight	5 (26)	2 (21)	0 (0)	7 (37)	2 (14)	0 (0)	0 (0)	2 (14)
	Overweight	0 (0)	4 (21)	4 (21)	8 (42)	0 (0)	2 (14)	2 (14)	4 (29)
	Obese	0 (0)	0 (0)	4 (21)	4 (21)	1 (7)	1 (7)	6 (43)	8 (57)
	Total	5 (26)	6 (32)	8 (42)	19 (100)	3 (21)	3 (21)	8 (57)	14 (100)

^aWeight categories as per International Obesity Task Force age-appropriate cutoffs: healthy weight, body mass index (BMI) 18.5-24.9 kg/m²; overweight, BMI 25-29.9 kg/m²; obese, BMI ≥30 kg/m².

^bBaseline: Cohen kappa coefficient= .57, SE 0.13, and % agreement=71; week 12: Cohen kappa coefficient=.54, SE 0.15, and % agreement=68 (Cohen kappa coefficient ranges from 0 to 1, where κ>.80 is almost perfect, .61≤κ≤.80 is substantial, .41≤κ≤.60 is moderate, .21≤κ≤.40 is fair, .00≤κ≤.20 is slight, and κ<.00 is poor).

^cBaseline: Cohen kappa coefficient=.62, SE 0.19, and % agreement=79; week 12: Cohen kappa coefficient=.51, SE 0.19, and % agreement=71.

^dData were available from 19 intervention families due to missing parent-reported weight.