Disparities in physical fitness of 6–11-year-old children: the 2012 NHANES National Youth Fitness Survey

BMC Public Health

Table 1 Sample characteristics of children ages 6–11 years old who participated in NHANES Youth Fitness Survey in 2012. N = 686

	Total	< 130% FIPR	130–349% FIPR	≥ 350% FIPR	p
	n (%)^a	n (%)^a	n (%)^a	n (%)^a	p
Total	686 (100.0)	258 (33.6)	251 (37.2)	117 (29.1)
Sex					0.021
Male	337 (51.3)	114 (47.2)	146 (58.2)	77 (47.2)
Female	349 (48.7)	144 (52.8)	105 (41.8)	100 (52.8)
BMI percentile^b					0.031
< 85th	427 (64.3)	171 (67.4)	135 (55.9)	121 (71.5)
85th – 95th	119 (16.5)	39 (15.1)	51 (19.4)	29 (14.4)^c
≥ 95th	139 (19.1)	48 (17.4)	64 (24.6)	27 (14.2)^c

Abbreviations: FIPR family income to poverty ratio, P values are obtained using Rao-Scott Chi-Squared test
^a Unweighted n (weighted percentage). Note: Weighted percentages were estimated by applying appropriate sampling weights and by using Taylor series linearization to account for complex sampling design
^b Frequency based on n = 685 due to missing value in body weight
^c Standard errors for percentage may be unstable due to small sample size

ISSN: 1471-2458