• 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.
(Arch Otolaryngol Head Neck Surg 1987;113:866-868)
Salzman MB, Biller HF, Schechter CB, BAILEY BJ. Passive Smoking and Croup. Arch Otolaryngol Head Neck Surg. 1987;113(8):866–868. doi:10.1001/archotol.1987.01860080072020
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