PVC – as flooring material – and its association with incident asthma in a Swedish child cohort study
Article first published online: 11 NOV 2010
© 2010 John Wiley & Sons A/S
Volume 20, Issue 6, pages 494–501, December 2010
How to Cite
Larsson, M., Hägerhed-Engman, L., Kolarik, B., James, P., Lundin, F., Janson, S., Sundell, J. and Bornehag, C. G. (2010), PVC – as flooring material – and its association with incident asthma in a Swedish child cohort study. Indoor Air, 20: 494–501. doi: 10.1111/j.1600-0668.2010.00671.x
- Issue published online: 11 NOV 2010
- Article first published online: 11 NOV 2010
- Received for review 10 June 2009. Accepted for publication 30 May 2010.
- Polyvinyl chloride-flooring;
- Incident asthma;
- Socioeconomic factor;
Abstract The Dampness in Buildings and Health study (DBH) started in the year 2000 in Värmland, Sweden, with a baseline questionnaire sent to all children (n = 14,077) aged 1–6. Five years later, a follow-up questionnaire was sent to the children who were 1–3 years at baseline. A total of 4779 children participated in both the baseline and the follow-up studies and constitute the study population in this cohort study. The aim of this study was to examine the association between exposure to PVC-flooring in the child’s and parent’s bedroom in homes of children aged 1–3 and the incidence of asthma, rhinitis, and eczema during the following 5-year period. Adjusted analyses showed that the incidence of asthma among children was associated with PVC-flooring in the child’s bedroom (AOR 1.52; 95% CI 0.99–2.35) and in the parent’s bedroom (1.46; 0.96–2.23). The found risks were on borderline of significance and should therefore be interpreted with caution. There was further a positive relationship between the number of rooms with PVC-flooring and the cumulative incidence of asthma. PVC-flooring was found to be a stronger risk factor for incident asthma in multifamily homes when compared with single-family houses and in smoking families compared with non-smoking families and in women.
These longitudinal data from the DBH study found an association between the presence of PVC-flooring in the home and incident asthma in children. However, earlier results from the DBH study have shown that PVC-flooring is one important source for phthalates in indoor dust, and exposure to such phthalates was found to be associated with asthma and allergy among children. This emphasizes the need for prospective studies that focus on the importance of prenatal and neonatal exposure to phthalates in the development of asthma and allergy in children.