Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Difference of predicted FEV1 means between the pollution categories from the mixed effects model after post-analysis using a Tukey method pairwise comparison test
| Difference—Category | Difference of means (Litres) | Standard Error (SE) of difference | Degrees of Freedom (DF) | Simultaneous 95% CI | T value | Adjusted P value |
|---|---|---|---|---|---|---|
| Medium—Low | −0.042 | 0.040 | 323 | (−0.136, 0.053) | −1.03 | 0.557 |
| High—Medium | −0.168 | 0.058 | 325 | (−0.305, −0.031) | −2.88 | 0.012 |
| High—Low | −0.209 | 0.042 | 323 | (−0.309, −0.109) | −4.94 | 0.000 |
