Association between maternal smoking during pregnancy and developmental disabilities in US children and adolescents: A cross-sectional study from NHANES.

Introduction: Maternal smoking during pregnancy is associated with placental DNA methylation and RNA expression, offspring DNA methylation, and affects the decline of mature neurons and the prenatal human brain development trajectory.

Methods: This study is a secondary analysis of data from the National Health and Nutrition Examination Survey (NHANES) spanning 2003 to 2008, comprising 10111 children and adolescents. Inclusion criteria required participants to have complete questionnaire responses regarding maternal smoking during pregnancy and receipt of special education or early intervention services. The risk of developmental disabilities was assessed using a multifactor logistic regression model.

Results: In the cohort of 10111 children and adolescents, 727 (7.2%) received special education or early intervention services. Of these participants, 1504 (14.9%) were exposed to maternal smoking during pregnancy. The prevalence of maternal smoking was higher (12.3%) in the group receiving special education or early intervention compared to those who did not (6.3%). After adjusting for other relevant factors in a multifactorial logistic regression model, maternal smoking during pregnancy was significantly associated with an increased likelihood of requiring special education or early intervention services (adjusted odds ratio, AOR=1.51; 95% CI: 1.24-1.83, p<0.001).

Conclusions: This cross-sectional analysis found an association between maternal smoking during pregnancy and the need for special education or early intervention services among US children and adolescents, after adjusting for confounding variables. Our findings suggest that maternal smoking during pregnancy may increase the odds of developmental disabilities.