Table 3.
Effects of Changes in Long Term Air Pollution (annual average) Concentrations on Changes in FeNO Levels Adjusted for Changes in Short-term Concentrations
| Pollutant | Difference* (95% C.I.) |
|---|---|
| NO2 | 2.29 (0.36, 4.21)† |
| PM2.5 | 4.94 (1.44, 8.47)‡ |
| PM10 | 0.14 (−2.01, 2.28) |
| O3 | 0.74 (−4.47, 3.01) |
*
Results are scaled to the IQR values of 1.8 ppb (NO2), 2.4 μg/m3 (PM2.5), 3.4 μg/m3 (PM10), and 2.1 ppb (O3) of changes in annual average pollution levels between the two years of study. Estimates are adjusted for short-term effects of the same air pollutant, for Year 5 and Year 6 of the study. Models are also adjusted for changes (or interactions with changes in age for time-independent covariates) in community, race/ethnicity, sex, asthma, asthma medication use, history of respiratory allergy, age, day of FeNO collection, and season.
†
P<0.05
‡
P<0.01