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Fig. 4 | Reproductive Health

Fig. 4

From: Paternal smoking and preterm birth: a population-based retrospective cohort study among non-smoking women aged 20–49 years in rural China

Fig. 4

Subgroup analyses on association between preconception paternal smoking and preterm birth. A parity; B history of adverse pregnancy outcomes. Point and bar represent odds ratio and its 95% confidence interval of paternal smoking and spontaneous abortion in fully adjusted logistic model. “*” stands for P linear < 0.05; “**” stands for P multiplicativity < 0.25

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