The association between prenatal SHS exposure and AD according to sensitization
Prenatal SHS exposure increased the risk of AD in sensitized children at school age (7–9 years) (aOR=1.048, 95%CI: 1.048–4.642), while no statistically significant association was observed in non-sensitized children (aOR=1.126, 95% CI: 0.465–2.730). This discriminatory incremental effect was also true for current AD, for which increased risk was observed in sensitized children (aOR=2.557, 95% CI: 1.114–5.869) but not in non-sensitized children (aOR=1.059, 95% CI: 0.424–2.640) (Table 3). No significant association between prenatal SHS exposure and AD was observed until age 6, regardless of sensitization.