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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: Environ Pollut. 2017 Nov 5;233:529–539. doi: 10.1016/j.envpol.2017.10.108

Figure 1.

Figure 1

a–d. Odds ratios for reported symptoms and 95% CI associated with one interquartile range increase in ambient levels of PM10, SO2, NO2 and NO from single pollutant distributed lags covariate-adjusted linear regression models among all participating children (n=432)

Notes:

1 Interquartile range (IQR): PM10: 29.35ug/m3; SO2: 6.98 ppb; NO2: 8.19 ppb; NO: 29.7 ppb.

2 Pollution levels used in regression models combine measured and imputed values

3 Covariates in each model: age, gender, race, school, caregiver smokes, caregiver’s education, household income, phase (season), asthma severity, interactions between asthma severity and exposure