With increasing Internet coverage, the use of a web-based survey for epidemiological study is a possibility. We performed an investigation in Japan in winter 2008 using the web-based daily questionnaire for health (WDQH). The WDQH is a web-based questionnaire survey formulated to obtain
information about the daily physical condition of the general public on a real-time basis, in order to study correlations between changes in physical health and changes in environmental factors. Respondents were asked whether they felt ill and had specific symptoms including fever. We analysed
the environmental factors along with the health conditions obtained from the WDQH. Four factors were found to influence health: minimum temperature, hours of sunlight, median humidity and weekday or holiday. The WDQH allowed a daily health survey in the general population in real time via
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Document Type: Research Article
Department of Public Health, Health Management and Policy, Nara Medical University School of Medicine, 840 Shijo-cho Kashihara, Nara, 634-8521, Japan
National Institute of Infectious Disease, Infectious Disease Surveillance Center, 1-23-1 Toyama Shinjuku-ku, Tokyo, 162-8640, Japan
Publication date: June 1, 2013
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