For example, the
4-year mean PM2.5 level in the community with
the highest levels of particulate matter (Mira
Changes in Lung-Function Growth
Across all three study cohorts, the mean FEV1
among girls increased from 2274 ml at 11 years
of age to 3150 ml at 15 years of age, for a mean
4-year increase of 876 ml (Table S3 in the Supplementary
Appendix). Among boys, the mean
FEV1
was 2311 ml at 11 years of age and 3831 ml
at 15 years of age, for a mean 4-year growth of
1520 ml. Similar magnitudes of growth were
observed for FVC