Children exposed to secondhand marijuana smoke had more respiratory infections

Caregivers who used marijuana reported an increased rate of viral respiratory infections in their children (1.31 episodes/year) compared to non-users (1.04 episodes/year, p=0.02). No significant differences were found for ED/UC visits, otitis media, or asthma exacerbations with marijuana smoke exposure.

Cross-sectional convenience sample survey of 1,500 caregivers in a pediatric ED. Inclusion: caregivers ages 21-85, English- or Spanish-speaking. Exclusion: critically ill, medically complex, or children over 11 or using medical marijuana. Negative-binomial regression estimated rates.

While secondhand tobacco smoke effects on children are well established, this is among the first studies to identify a specific health risk from secondhand marijuana smoke in children.

As marijuana legalization expands, household exposure patterns change. The finding that secondhand marijuana smoke specifically increases respiratory infections, distinct from tobacco's broader effects, warrants attention from public health messaging.

Cross-sectional design cannot establish causation. Self-reported marijuana use likely underestimated. Convenience sample from one pediatric ED. Did not measure actual smoke exposure levels. Confounders like socioeconomic factors not fully controlled.