Does Decreased Access to Emergency Departments Affect Patient Outcomes? Analysis of AMI Population 1996-2005

Abstract

Objective—We analyze whether decreased emergency department access results in adverse patient outcomes or changes in the patient health profile for patients with acute myocardial infarction (AMI). Data—We merge Medicare claims, American Hospital Association annual surveys, Medicare hospital cost reports, and location information for 1995–2005. Study Design—We define 4 ED access change categories and estimate a Zip codes fixed-effects regression models on the following AMI outcomes: mortality rates, age, and probability of PTCA on day of admission. Principal Findings—We find a small increase in 30-day to 1-year mortality rates among patients in communities that experience a 30-minute increases, we find a substantial increase in long-term mortality rates, a shift to younger ages (suggesting that older patients die en route), and a higher probability of immediate PTCA. Most of the adverse effects disappear after the transition years. Conclusions—Deterioration in geographic access to ED affects a small segment of the population, and most adverse effects are transitory. Policy planners can minimize the adverse effects by providing assistance to ensure adequate capacity of remaining EDs, and facilitating the realignment of health care resources during the critical transition periods.