Increases in the use of hospital emergency departments (EDs) might contribute to crowding at some EDs, higher health care costs, and lower-quality primary care. This study examines the extent to which differences in populations and health system factors account for variations in ED use across U.S. communities. Contrary to popular perceptions, communities with high ED use have fewer numbers of uninsured, Hispanic, and noncitizen residents. Outpatient capacity constraints also contribute to high ED use. However, high ED use in some communities also likely reflects generic preferences for EDs as a source of care for nonurgent problems. 1 About one-third of ED visits are classified as nonurgent or semi-urgent, which suggests that the care sought during many of these visits could be provided in other settings. Although the causes of ED overcrowding might have more to do with inadequate inpatient capacity at hospitals, increases in ED use contribute to overcrowding, which can lead to longer waiting times and more ambulance diversions to other facilities.2 Growing use of the ED for nonurgent medical problems can also increase health care costs and negatively affect quality of, continuity of, and patients' satisfaction with care. n Explanations for increased ED use. Numerous explanations for the increase in ED use by the U.S. population have been offered. These include changes in the population that have increased demand for EDs, and health system changes that have constrained capacity of other outpatient care. Increases in the number of uninsured people, who lack access to other types of outpatient care, are often cited.
D a t a W a t c h