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

Table 2

The comparison of FeNO value among Schools I, II, III.

	School I; (3.3 km near factory)	School II; (8.8 km near factory)	School III; (27.7 km near factory)	value; School I vs II	value; School I vs III	value; School II vs III
FeNO (ppb)					<0.001	<0.001
					<0.001	<0.001
					<0.001	<0.001

Unadjusted values, adjusted by age, and adjusted by age, sex, and BMI. Data were showed as mean ± sd.