Table 1.

Selected Demographic Characteristics for 2568 Children with Valid FeNO measurements, Children's Health Study

	Girls (N = 1316)		Boys (N = 1252)
Counts	Number	%	Number	%
Race/ethnicity
Non-Hispanic White	452	34.4	440	35.1
Hispanic	731	55.6	688	55.0
African-American	27	2.0	22	1.8
Asian-American	40	3.0	40	3.2
Other/Unknown	66	5.0	62	4.9
Age
< 8 yr	447	34.0	372	29.7
8–9 yr	644	48.9	592	47.3
>= 9 yr	225	17.1	288	23.0
Clinical Group
Healthy	613	46.6	557	44.5
Allergy Only	608	46.2	562	44.9
Asthma Only	20	1.5	26	2.1
Allergy + Asthma	75	5.7	107	8.5
Summary Statistics	Mean ± SD	Range	Mean ± SD	Range
Age, yr	8.3 ± 0.6	6.4 – 10.4	8.4 ± 0.7	7.0 – 10.5
Height, cm	129 ± 7	108 – 157	131 ± 7	113 – 158
Weight, kg	30 ± 8	17 – 70	32 ± 8	19 – 72
Residual height-for-age, cm[a]	0 ± 6	-18 – +24	0 ± 6	-17 – +22
Residual weight-for-height, kg[b]	0 ± 5	-21 – +28	0 ± 6	-17 – +35

^[a] Observed height minus predicted height for subject's age; predicted values determined from cubic polynomial fit to data for all subjects of the same sex in this population (see text).

^[b] Observed weight minus predicted weight for subject's height; predicted values determined as described in note [a].