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.
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This study uses pooled 2016–2024 NSCH data to examine associations between household cigarette exposure and parent-reported functional outcomes among 2,371 U.S. children with current epilepsy. The approach is sensible for the stated question: a clearly defined exposure (household cigarette use; indoor smoking as secondary), multiple prespecified functional endpoints, and survey-weighted multivariable logistic models adjusting for key sociodemographic confounders and survey year. The main result—household cigarette exposure associating with a higher odds of a composite functional burden measure and with missed school/activity limitation, but not clearly with parent-rated seizure severity or ER use—hangs together and is plausibly interpreted as “tracks with burden more than perceived severity.” The authors also show awareness of key implementation pitfalls in NSCH (restricted-universe items; weight handling) and document corrective steps. The largest uncertainty is residual confounding and construct validity: household smoking is strongly correlated with unmeasured factors (caregiver mental health, household chaos, health literacy, comorbid neurodevelopmental conditions, medication adherence, secondhand smoke exposure intensity, and broader deprivation) that can drive absenteeism and activity limitation without affecting seizure severity. The composite endpoint, while pragmatic, mixes healthcare utilization and function and may be dominated by components differently related to smoking; component-wise results beyond those reported (including absolute risks) would help interpret what is being captured. Methodologically, the description suggests “normalizing weights” and fitting weighted logistic models, but it is unclear whether the analysis used full complex survey design features (strata/PSU) versus weights alone; variance estimation and CIs can be materially affected. Given these limitations, the conclusion is appropriately cautious about causality and is largely (n