Accuracy of Neck Circumference in Classifying Overweight and Obese US Children

Table 2

Cut-off values of neck circumference (NC), body mass index (BMI), and percent body fat (BF%) for classifying overweight/obese children.

Age; (yrs)	NC (cm) by Nafiu et al. [12]		BMI^a		BF%^b
	Boys	Girls	Boys	Girls	Boys	Girls
7	28.7	27.1	17.4	17.6	17.5	19.5
8	29.0	27.9	18.0	18.3	18.9	20.9
9	30.5	29.3	18.6	19.1	20.7	22.7
10	32.0	30.5	19.4	20.0	22.5	24.4
11	32.2	31.0	20.2	20.9	23.7	25.8
12	32.5	31.1	21.0	21.7	23.7	26.8
13	33.5	31.3	21.9	22.6	22.9	27.8

aCenters for Disease Control and Prevention growth charts (5th–85th percentile being normal weight, ≥85th percentile being overweight/obese for boys and girls).
^bPercent body fat standards (<69th percentile being normal weight for boys, ≥69th percentile being overweight/obese for boys, <68th percentile being normal weight for girls, ≥69th percentile being overweight/obese for girls).