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Figure 1 | Environmental Health

Figure 1

From: A prospective cohort study of biomarkers of prenatal tobacco smoke exposure: the correlation between serum and meconium and their association with infant birth weight

Figure 1

Geometric mean meconium tobacco smoke metabolite concentration by duration and intensity of prenatal tobacco smoke exposure. Unexposed indicates all three prenatal serum cotinine measurements were <LOD. 1X, 2X, and 3X indicate the number of serum cotinine measurements consistent with secondhand or active tobacco smoke exposure. Error bars represent 95% CI of the geometric mean.

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Environmental Health

ISSN: 1476-069X