Household Cigarette Exposure and Functional Burden in Pediatric Epilepsy: Pooled Evidence from the 2016-2024 National Survey of Children's Health
Objective: to test whether household cigarette exposure is associated with worse outcomes among U.S. children with current epilepsy. Methods: we pooled the 2016-2024 National Survey of Children's Health topical public-use files and identified 2,371 children with current epilepsy. The primary exposure was household cigarette use; smoking inside the home was analyzed secondarily. Outcomes were parent-reported moderate/severe epilepsy, any emergency room visit, seven or more missed school days, activity limitation, and a composite burden endpoint defined as any ER visit, high absence, or activity limitation. Weighted logistic models adjusted for age, sex, race/ethnicity, poverty, food insecurity, and survey year. Results: household cigarette exposure was common in the epilepsy cohort (weighted 19.2%). It was associated with higher adjusted odds of composite burden (OR 1.85, 95% CI 1.35-2.54), seven or more missed school days (OR 1.38, 95% CI 1.04-1.81), and activity limitation (OR 1.34, 95% CI 1.07-1.68). Associations with parent-rated epilepsy severity and ER use were not clearly different from the null after adjustment. Indoor smoking estimates were less stable because relatively few children were exposed. Conclusions: among children with current epilepsy, household cigarette exposure tracks more strongly with functional burden than with parent-rated seizure severity. The finding is observational and cannot establish causality, but it identifies smoking exposure as a plausible marker of elevated burden in pediatric epilepsy care.
Reviews
This study leverages pooled 2016–2024 NSCH data to examine whether household cigarette exposure among U.S. children with current epilepsy is associated with parent-reported functional burden. The main strengths are the use of a large, nationally representative survey with appropriate survey-weighted modeling, a clearly defined primary exposure, and clinically interpretable outcomes (school absence, activity limitation, and a pre-specified composite). The primary finding—an adjusted association between household cigarette exposure and a composite burden endpoint (OR ~1.85) driven by school absence and activity limitation—seems supported by the analyses as described and is framed with reasonable caution as an observational association/marker rather than a causal effect. The major uncertainties are residual confounding and construct validity. Household smoking is tightly coupled to unmeasured social and clinical factors (caregiver mental health, housing instability, comorbid neurodevelopmental conditions, epilepsy type/treatment complexity, access to specialty care), many of which could directly influence missed school and limitations, potentially inflating the apparent smoking–burden relationship. The cross-sectional design also blurs directionality (higher-burden epilepsy may increase household stress and smoking). Additionally, reliance on parent-reported epilepsy “severity” and exposure may introduce misclassification, and the composite endpoint may mask heterogeneous effects (e.g., school vs ER use). Overall, the conclusion that smoking exposure “tracks with” functional burden more than reported seizure severity is justified; any implication of smoking as an independent risk factor would require stronger handling of confounding, temporality, and sensitivity analyses (e.g., negative controls, additional covariates, propensity methods, or stratification by socioeconomic context and comorbidity).