Lekshmi Priya et al., 2025)
Most were cross-sectional, meaning exposure and outcome were measured at the same time
& Desai, P
Severe allergic reactions to nicotine can occur rarely and may include difficulty breathing, facial swelling, hives, irregular heartbeat, chest pain, and seizures
Thereby, it is possible that there might be instances of heterogeneity in the variables utilized within each specific cross-sectional unit, potentially leading to inadequacies despite the adjustment of year clusters made in the model to account for such issues
The Danish study [13] used smoking 15 cigarettes per day to define light smoking and showed that infants born to mothers who smoked a low dose of cigarettes per day were at a marginally reduced risk of major malformations (OR 0.96, 95% CI 0.921.01)