Environmental tobacco smoke (ETS) exposure is a public health concern linked to neurodevelopmental disorders like attention deficit hyperactivity disorder (ADHD). Prior studies link ETS to ADHD, but gaps remain regarding gender differences, critical exposure windows, and dose-response relationships. This study assessed ETS exposure’s association with ADHD-like behaviors in Chinese preschoolers, evaluating overall risk, critical periods, dose-response relationships, and gender differences….
