Event history analysis of indoor thermal environment and care prevention of residents: A field survey on the effect of winter indoor thermal environment on care requirements

The aim of this paper is to clarify the relationship between the indoor thermal environment and care prevention. A field study comprising actual measurements, questionnaire surveys, and data collection from face sheets was conducted in 2014. Participants were classified into two groups based on frequency of feeling cold in their rooms. Age at certification of needing long-term care was compared between the groups by using survival analysis. The result was significant when the classification condition was frequency of feeling cold in their dressing rooms. The age at which half of the group acquired their certification was 76 years in the high-frequency group and 80 years in the low-frequency group.