Proposal of evaluation method for indoor dampness using self-reported questionnaire and national survey on associations between allergic diseases and indoor environmental factors among children

Abstract

In recent years, the population of Japan has experienced an increase in allergy-type ailments such as asthma and other forms of respiratory distress, particularly among members of the younger generation. There are several reasons behind this upsurge in allergy-type diseases, and it is deemed likely that indoor dampness provides some of the strongest contributory factors. In order to clarify the association between child allergic diseases and indoor dampness, a cross-sectional survey has been conducted to 4-12 years old children through the internet survey. This paper described the evaluation method of indoor dampness using the results of occupants' self-reported questionnaire. The dampness index proposed in this paper revealed the association between indoor dampness and allergic disease such as asthma and rhinitis. We conclude that children who are living in dampness are at significant risk for respiratory symptoms.