The Use of Household Cleaning Sprays and Adult Asthma: An International Longitudinal Study.
Am J Respir Crit Care Med. 2007 Jun 21
Zock JP, Plana E, Jarvis D, Anto JM, Kromhout H, Kennedy SM, Kunzli N, Villani S, Olivieri M, Toren K, Radon K, Sunyer J, Dahlman-Hoglund A, Norback D, Kogevinas M.
Centre for Research in Environmental Epidemiology (CREAL), Municipal Institute of Medical Research (IMIM), Barcelona, Spain.
RATIONALE: Cleaning work and professional use of certain cleaning products have been associated with asthma, but respiratory effects of non-professional home cleaning have rarely been studied.
OBJECTIVES: To investigate the risk of new-onset asthma in relation to the use of common household cleaners.
METHODS: Within the follow-up of the European Community Respiratory Health Survey in 10 countries, we identified 3,503 persons doing the cleaning in their homes and free of asthma at baseline. Frequency of use of 15 types of cleaning products was obtained in a face-to-face interview at follow-up. We studied the incidence of asthma defined as physician diagnosis and as symptoms or medication usage at follow-up. Associations between asthma and the use of cleaning products were evaluated usingmultivariable Cox' proportional hazards or logbinomial regression analysis.
MAIN RESULTS: The use of cleaning sprays at least weekly (42% of participants) was associated with the incidence of asthma symptoms or medication (Relative Risk (RR) 1.49; 95% confidence interval 1.12-1.99) and wheeze (RR 1.39; 1.06-1.80). The incidence of physician-diagnosed asthma was higher among those using sprays at least four days per week (RR 2.11; 1.15-3.89). These associations were consistent for subgroups and not modified by atopy. Dose-response relationships (p<0.05) were apparent for the frequency of use and the number of different sprays. Risks were predominantly found for the commonly used glass cleaning, furniture and air refreshing sprays. Cleaning products not applied in spray-form were not associated with asthma.
CONCLUSIONS: Frequent use of common household cleaning sprays may be an important risk factor for adult asthma.