Cough during infancy and subsequent childhood asthma

Summary Objectives Wheezing in infancy has been associated with subsequent asthma, but whether cough similarly influences asthma risk has been little studied. We sought to determine whether prolonged cough and cough without cold in the first year of life are associated with childhood asthma. Methods...

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Bibliographic Details
Published in:Clinical and experimental allergy 2015-09, Vol.45 (9), p.1439-1446
Main Authors: Oren, E., Rothers, J., Stern, D. A., Morgan, W. J., Halonen, M., Wright, A. L.
Format: Article
Language:English
Subjects:
allergy
Asthma - epidemiology
Asthma - etiology
childhood asthma
cough
Cough - complications
Cough - epidemiology
Disease Susceptibility
Female
Humans
Infant
Infant, Newborn
LRIs
Male
parental asthma
Prospective Studies
Risk Factors
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Summary:Summary Objectives Wheezing in infancy has been associated with subsequent asthma, but whether cough similarly influences asthma risk has been little studied. We sought to determine whether prolonged cough and cough without cold in the first year of life are associated with childhood asthma. Methods Participants in the Infant Immune Study, a non‐selected birth cohort, were surveyed 7 times in the first 9 months of life regarding the presence of wheeze and cough. Cough for more than 28 days was defined as prolonged. Parents were asked at 1 year if the child ever coughed without a cold. Asthma was defined as parental report of physician diagnosis of asthma, with symptoms or medication use between 2 and 9 years. Logistic regression was used to assess adjusted odds for asthma associated with cough characteristics. Results A total of 24% (97) of children experienced prolonged cough and 23% (95) cough without cold in the first 9 months, respectively. Prolonged cough was associated with increased risk of asthma relative to brief cough (OR 3.57, CI: 1.88, 6.76), with the risk being particularly high among children of asthmatic mothers. Cough without cold (OR 3.13, 95% CI: 1.76, 5.57) was also independently associated with risk of childhood asthma. Both relations persisted after adjustment for wheeze and total IgE at age 1. Conclusions and Clinical Relevance Prolonged cough in infancy and cough without cold are associated with childhood asthma, independent of infant wheeze. These findings suggest that characteristics of cough in infancy are early markers of asthma susceptibility, particularly among children with maternal asthma.
ISSN:0954-7894
1365-2222
DOI:10.1111/cea.12573