Table 2.
Linear regression models of predicted BC (average summer and winter) by lung function measures: effect estimate [% (95% CI)] for change in percent predicted lung function per IQR increase in BC (0.22 μg/m3) (n = 272).
| BC model | FEV1 | FVC | FEF25–75% |
|---|---|---|---|
| Adjust demographicsa | −1.08 (−2.5 to 0.3) | −0.62 (−1.9 to 0.6) | −2.97 (−5.8 to −0.2) |
| Adjust above + tobaccob | −1.10 (−2.5 to 0.3) | −0.62 (−1.9 to 0.6) | −3.04 (−5.9 to −0.2) |
| Adjust above + asthma + bronchitis | −1.09 (−2.5 to 0.3) | −0.62 (−1.9 to 0.6) | −3.03 (−5.8 to −0.3) |
a
We adjusted all models for age, race/ethnicity, education level, and year of assessment.
b
Tobacco = current and past smoking.