Aerosol cleaners used in the home may cause asthma

These are the main results from a multicentre, multinational study conducted by various research teams, including the Centre for Research in Environmental Epidemiology (CREAL- Centre de Recerca en Epidemiologia Ambiental) and the Municipal Institute of Medical Research (IMIM- Institut Municipal d’Investigació Mèdica- Hospital del Mar). Other teams from Germany, Canada, Holland, Italy, the United Kingdom and Sweden have participated as well, under the coordination of the CREAL–IMIM researchers. These results have been recently published in the online edition of the American Journal of Respiratory and Critical Care Medicine.

Certain previous epidemiological studies have shown a risk of asthma amongst cleaning professionals. Nevertheless, no study had been designed that was able to demonstrate this relation in the non-professional or domestic cleaning setting. A total of 3,503 people were monitored in the European Community Respiratory Health Survey (ECRHS) once the ethical committees from the 22 participating health centres (from 10 different countries) accepted the study protocol. The participants were men and women between the ages of 20 and 44 who were initially free of asthma at the time they joined the study. They regularly cleaned their homes and accepted the conditions of their participation in the study by signing the corresponding informed consent document.

The survey revealed that these participants regularly used up to fifteen different types of cleaning products with various frequencies: daily; from one to three days a week; once a week; or even less. Throughout the study, the presence of respiratory illness was assessed through diagnosis, symptoms and the use of asthma treatments.

The researchers of this study have confirmed that “despite the fact that the use of aerosol cleaners is related to a significant risk of developing asthma in adults, this finding requires future research in order to identify the actual chemical composition responsible for the sensitisation and the characteristic inflammatory reactions of the induced respiratory effects in adults”.