Modifying factor (N) | NO2 | PM2.5 | PM10 | O3 |
---|---|---|---|---|
Asthma | ||||
No Asthma–No Asthma (1052) | 2.2 (0.22, 4.12)† | 5.3 (1.68, 8.83)‡ | 0.1 (−2.07, 2.24) | −0.5 (−4.24, 3.30) |
No Asthma–Asthma (23) | 3.1 (−2.38, 8.64) | 1.8 (−9.1, 12.65) | −4.6 (−9.76, 0.65) | −2.7 (−10.79, 5.33) |
Asthma–Asthma (136) | 2.8 (0.32, 5.31)† | 3.5 (−1.272, 8.28) | 0.6 (−2.14, 3.264) | −2.31 (−7.31, 2.71) |
Interaction p value | 0.75 | 0.55 | 0.14 | 0.53 |
Allergy | ||||
No Allergy–No Allergy (441) | 2.3 (0.32, 4.46)† | 5.0 (1.20, 8.78)‡ | 0.7 (−1.60, 3.09) | −1.0 (−5.04, 2.98) |
No Allergy–Allergy (44) | 1.1 (−2.83, 5.02) | 4.7 (−2.54, 12.02) | 1.2 (−3.60, 5.98) | 0.9 (−5.06, 6.78) |
Allergy–Allergy (726) | 2.2 (0.23, 4.28)† | 4.9 (1.25, 8.62)‡ | −0.1 (−2.35, 2.04) | −0.756 (−4.60, 3.09) |
Interaction p value | 0.78 | 0.99 | 0.41 | 0.77 |
Season | ||||
Warm–Warm (226) | 2.0 (−0.50, 4.50) | 6.9 (1.90, 11.86)‡ | −0.2 (−2.79, 2.38) | 1.1 (−4.03, 6.22) |
Cold–Warm (368) | 2.4 (−0.90, 5.74) | 3.4 (−0.77, 7.66) | 0.5 (−2.7, 3.74) | −0.7 (−5.92, 5.59) |
Warm–Cold (213) | 3.1 (0.36, 5.81)† | 11.8 (3.22, 20.30)‡ | 0.4 (−2.55, 3.30) | 3.3 (−3.80, 10.58) |
Cold–Cold (404) | 2.8 (−1.15, 6.71) | 4.5 (−0.48, 9.41) | 0.6 (−3.03, 4.15) | −0.6 (−5.59, 4.41) |
Interaction p value | 0.82 | 0.08 | 0.90 | 0.63 |
Gender | ||||
Boys (571) | 2.5 (0.41, 4.67)† | 4.2 (0.46, 7.94)‡ | 0.1 (−2.14, 2.28) | −1.6 (−5.52, 2.40) |
Girls (640) | 2.2 (0.22, 4.14)† | 5.7 (1.94, 9.41)‡ | 0.2 (−2.07, 2.45) | −0.1 (−3.99, 3.72) |
Interaction p value | 0.59 | 0.24 | 0.87 | 0.22 |
*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. Models are also adjusted, as appropriate, 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.