Risk Factors for Heatstroke among Japanese Forestry Workers

We examined the risk factors for heatstroke among forestry workers in Japan during the summer. We distributed a questionnaire to 124 forestry workers to determine heatstroke symptoms, degree of sweating and hydration, as well as perceived hotness and amount of sunlight at work sites. Forty of the workers (32.3%) reported experiencing heatstroke symptoms. Thirteen and 21 of them reported such symptoms during July and August, respectively. Eleven workers experienced heatstroke at around 14：00; 5 and 4 developed symptoms at around 11：00 and 10：00, respectively. Groups with and without heatstroke symptoms significantly differed in terms of perceived hotness (p