Group B streptococcal colonization: Prevalence and impact of smoking in women delivering term or near term neonates in a large tertiary care hospital in the southern United States.

In general, therefore, there was a decreasing trend of GBS colonization with increasing maternal age (P of Trend = 0.023; also see Fig 1 ).

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When a clear trend emerged, maternal age was subsequently empirically expanded to 5 groups (<20, 20–24, 25–29, 30–34, and 35+) to explore whether the trend continued.

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