Comparison of the Fractional Exhaled Nitric Oxide Levels in Adolescents at Three Schools Located Three Different Distances from a Large Steel Mill

Table 1

Characteristics of patients included in the study.

	School I; (3.3 km near factory)	School II; (8.8 km near factory)	School III; (27.7 km near factory)	p value
Age (year)				<0.001
Sex F/M (%)	71/71 (50/50)	69/62 (52.7/47.3)	65/49 (57/43)	0.535
BMI (kg/m^2)				0.274
FEV1%				0.795
FVC%				0.845
FEV1/FVC				0.939
PEF%				0.002

BMI: body mass index, FEV₁: forced expiratory volume in 1 second, FVC: forced vital capacity, and PEF: peak expiratory flow. Data showed as mean value ± SEM.