Occupational Asthma Reference

Karjalainen A, Martikainen R, Karjalainen J, Klaukka T, Kurppa K, Excess incidence of asthma among Finnish cleaners employed in different industries, Eur J Respir Dis, 2002;19:90-95,10.1183/09031936.02.00201002

Keywords: Finland, cleaner,

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Abstract

The incidence and risk of asthma among female cleaners employed in different industries was explored. An increased risk of asthma has been associated with the cleaning profession, in some but not all studies.

All Finnish females employed as cleaners and all those employed in administrative work were followed for asthma incidence through a record linkage in 1986–1998. An individual was defined as an “incident case of asthma” if they received rights for special reimbursement of asthma medication from the national health insurance or were recognized as having occupational asthma. Age-adjusted relative risks (RR) were estimated for cleaners in comparison with those employed in administrative work.

There were 2,414 and 5,235 cases of asthma among the cleaners and administrative workers, respectively. The RR was 1.50 (95% confidence interval (CI) 1.43–1.57) in cleaners. The risk was increased in cleaners working in nearly all major sectors of economic activity, but cleaners employed by companies concerned with the manufacture of basic metals (RR 2.47; 95% CI 1.68–3.64) and food products (RR 2.19; 95% CI 1.69–2.85) had the highest risk. Only 25 of the “cases of asthma” among cleaners had been recognized as being occupational asthma.

It could be concluded that cleaners have an increased risk of persistent adult-onset asthma. Factors inherent to the environment where cleaning is performed or differences in the cleaning agents used may explain the observed differences between industries.

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