Estimated effects of disinfection by-products on preterm birth in a population served by a single water utility.

Environ Health Perspect · 2007 · PMC1831522 · PMID 17384780

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a positive trendno p-value reported

2003 ) also provide evidence of a positive trend with length of gestational age—higher TTHM exposure and increasing gestational length.

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a negative trendno p-value reported

A negative trend was observed per 10-μg/L increase in TTHM for both exposure-averaging periods ( Table 3 ).

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