. Author manuscript; available in PMC: 2014 May 14.

Published in final edited form as: Eur Respir J. 2010 Jul 15;37(3):523–531. doi: 10.1183/09031936.00021210

Table 2.

Association of Exhaled Nitric Oxide (FeNO) with New-Onset Asthma in the Children's Health Study

Age-Specific Quartiles of FeNO at Baseline	New-onset Asthma		No Asthma		HR¹	95% CI
Age-Specific Quartiles of FeNO at Baseline	(N= 129)	%	(N= 2077)	%	HR¹	95% CI
Quartile 1	24	19%	528	25%	1
Quartile 2	30	23%	521	25%	1.53	0.89–2.63
Quartile 3	30	23%	523	25%	1.68	0.97–2.90
Quartile 4	45	35%	505	24%	2.11	1.26–3.51

					p_trend<0.01

HR=Hazard ratio, adjusted for race/ethnicity, lifetime wheeze and community with baseline strata for age and gender