Table 2.

Associations of precipitation (per 2 mm per day) at home address with fractional exhaled nitric oxide and lung function in early adolescence

Precipitation Moving Averages	Difference in FeNO (95% CI)	Difference in FEV1 (ml) (95% CI)	Difference in FVC (ml) (95% CI)
1 d	0.1% (−1.1 to 1.4)	1.7 (−4.7 to 8.0)	0.7 (−6.0 to 7.4)
2 d	1.5% (−0.2 to 3.2)	3.0 (−5.8 to 11.8)	2.9 (−6.4 to 12.3)
3 d	2.1% (0.2 to 4.0)*	3.6 (−6.5 to 13.6)	2.3 (−8.3 to 12.9)
7 d	4.0% (1.1 to 6.9)*	0.5 (−14.4 to 15.4)	0.5 (−15.2 to 16.3)

Definition of abbreviations: CI = confidence interval; Fe_NO = fractional exhaled nitric oxide; FEV₁ = forced expiratory volume in 1 s; FVC = forced vital capacity.

Linear regression models are adjusted for maternal education and household income at enrollment; any smoking in the home in early adolescence; child sex, race/ethnicity, and ever asthma diagnosis; age, height, weight, date, and season (as sine and cosine functions of visit date) at the early adolescent visit; and moving averages for mean daily temperature (same time window as exposure).

^*P < 0.05.