The American journal of emergency medicine
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To determine whether ambulance arrival to the emergency department has remained an unidentified signal of perceived medical acuity. Informed by economic signaling theory, does arrival via ambulance affect resource utilization given varying levels of patient acuity? ⋯ The results are consistent with the notion that emergency department medical providers readily accept ambulance transport as a valid signal of patient acuity, regardless of true acuity level. Consequently, patients transported to the hospital via ambulance may be receiving a disproportionate amount of medical resources in an increasingly cost-conscious environment.