Abstract
Background This study aimed to describe the clinical characteristics and epidemiology of heat-related illnesses presented at a tertiary hospital in Singapore. Method This retrospective observational study utilized electronic health records from the emergency department (ED) of Singapore General Hospital. Patients primarily diagnosed with heat-related illnesses from 2008 to 2020, were analyzed. The annual number of cases and the temporal trend of heat-related illnesses were described, along with the characteristics of patients. Results Among the 1,833,908 patients registered at the ED, 426 patients had diagnoses of heat-related illnesses. The median age (interquartile range [IQR]) was 32 (22, 43) years, with 303 (71%) being male and 201 (47%) not being Singapore citizens. The annual number of cases ranged from a minimum of 21 in 2019 to a maximum of 49 cases in 2015, except for four cases in 2020. Heat-related illnesses occurred most commonly on Sundays (233, 55%) and in December (97, 23%). A significant number of cases in December coincided with the day of an annually organized marathon (91, 21%). Approximately half of the total cases required hospitalization, with 183 (43%) admitted to the general ward and 31 (7%) admitted to the intensive care unit. The 30-day mortality was 2 (0.5%). Conclusion This descriptive study indicated the unique characteristics of heat-related illness in a tertiary care hospital in Singapore. These local contexts may be valuable to consider preventative measures for heat-related illness, in preparation for future extreme weather events related to climate change.
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