Proximity to hospital facilities and duration of the prehospital interval are crucial measures when studying injury outcomes,1 but most large administrative data sets lack information on prehospital time or distance from the site of an injury event to the treating hospital.2,3 We sought to validate zip code–based estimates of ambulance driving distance to support future use of administrative data sets in the study of emergency medical services, trauma systems, and injury outcomes.
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Jarman MP, Sturgeon D, Mathews I, Uribe-Leitz T, Haider AH. Validation of Zip Code–Based Estimates of Ambulance Driving Distance to Control for Access to Care in Emergency Surgery Research. JAMA Surg. 2019;154(10):970–971. doi:https://doi.org/10.1001/jamasurg.2019.2179
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