Salzman M B, Filler H F, Schechter C B
Arch Otolaryngol Head Neck Surg. 1987 Aug;113(8):866-8. doi: 10.1001/archotol.1987.01860080072020.
The relationship between croup and the presence of household cigarette consumption was assessed in a matched-pair case control study. Fifty subjects with a primary hospital discharge diagnosis of croup were paired with children with a primary hospital discharge diagnosis of abdominal hernia. The results yielded an estimated relative risk of 0.82. The power of this study to detect a relative risk of 2.0 was 38%. This study fails to show a relationship between passive smoking and croup in early childhood.
