Asthma hospital readmissions linked to tobacco smoke

In a US study among 619 children (half of whom were African American), caregiver reports of tobacco exposure were not associated with readmission to hospital within a year but detectable serum or salivary cotinine was associated with a 60% increased risk of readmission.

Among children whose caregivers reported no household or car exposure to tobacco, 39% had detectable serum cotinine and 70% had detectable salivary cotinine.

The authors noted it may be socially desirable to underreport