Ambient heat and risks of emergency department visits among adults in the United States: time stratified case crossover study.

14 18 43 For example, in an analysis of hospital admissions in 12 European cities, the authors reported that the association between high temperature and cardiovascular admissions tended to be negative and did not reach statistical significance. 9 Some have suggested that these results could indicate that during extreme heat events, people are more likely to die before being admitted to a hospital. 9 45 This explanation is supported by previous reports of a greater burden of dying outside a hospital than inside a hospital during extreme heat events. 45 46 Previous research has established that some individuals or populations are at much greater risk of heat related health effects than others, although which groups are identified as most susceptible varies across studies.

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