Environmental Health Perspectives (EHP) is a monthly journal of peer-reviewed research and news on the impact of the environment on human health. EHP is published by the National Institute of Environmental Health Sciences and its content is free online. Print issues are available by paid subscription.DISCLAIMER
Brauer et al. [Environ Health Perspect
116:680–686 (2008)] identified several minor errors in their recent publication. First, in the "Results" section of the abstract, the values given for low full-term birth weight (LBW) were incorrect; "Residence within 50 m of highways was associated with … a 22% (95% CI, 0.81–1.87) increase in LBW." There were also inconsistencies in the description and application of missing data rules across all pollutants (Tables 3–7); the description of these rules in the text (bottom of p. 681) should read "For both approaches, a subject was considered missing if there was a gap of > 5 consecutive days in air monitoring data or if there were > 10 missing days within the term of the pregnancy."
In Tables 2, 3, and 5, results for the small-for-gestational-age (SGA) outcome were presented for births restricted to gestational periods of ≥ 37 weeks, and not for the full cohort; in Tables 2, 3, 5, and 7, coding errors in the application of birth weight and gestational period cutoffs resulted in slight differences in the number of cases of SGA and preterm births; and in Tables 5 and 6, one road proximity measure was not labeled correctly: < 150 m from a major road/highway was actually 50–150 m from a major road/highway.
Correcting these errors results in small changes in the numbers of subjects included in specific analyses and slight differences in odds ratios (ORs) but does not alter our overall findings. The corrected tables are presented below.