Role of exhaled nitric oxide as a predictor of atopy

Respiratory Research

Table 2 Single variable and multivariable analyses of factors associated with Fractional exhaled nitric oxide (FeNO)

		Fractional exhaled nitric oxide in ppb
	n	Geometric mean (SD)	P	Coefficient in log ppb	P
Sex
Male	622	15.8 (0.7)	<0.001	Reference
Female	577	12.4 (0.7)	<0.001	−0.22	<0.001
Atopy
Yes	556	17.6 (0.6)	<0.001	0.36	<0.001
No	643	11.6 (0.8)	<0.001	Reference
Current asthma
Yes	89	27.9 (1.0)	<0.001	0.48	<0.001
No	1110	13.3 (0.7)	<0.001	Reference
Allergic Rhinitis
Yes	201	21.8 (0.9)	<0.001	0.31	<0.001
No	998	12.8 (0.7)	<0.001	Reference
Season of FeNO measurement
Fall	236	18.9 (21.6)	<0.01	Reference
Winter	424	19.1 (22.9)		0.11	0.07
Spring	451	20.0 (23.3)		0.20	<0.001
Summer	88	23.1 (20.9)		0.23	0.01
Site
Lima	574	15.6 (0.8)	<0.001	Reference
Tumbes	625	12.4 (0.7)	<0.001	−0.01	0.74
Personal history of tobacco smoke
Yes	54	18.1 (0.8)	<0.01
No	1086	14.1 (0.7)	<0.01	0.12	0.20
Body mass index (kg/m ² )
Low weight	18	17.2 (15.9)	0.15	Reference
Normal	936	18.9 (21.1)		0.01	0.93
Overweight	212	22.9 (23.2)		0.14	0.48
Obese	33	22.8 (28.7)		0.04	0.80
Second hand smoke
Yes	232	14.3 (0.7)	0.11	−0.07	0.20
No	967	13.1 (0.8)	0.11	Reference

ISSN: 1465-993X