When an emergency department (ED) closes, neighboring hospitals—“bystander hospitals”—feel the effects, especially if they are already near or at full capacity: The health outcomes for their patients worsen, according to findings from a study funded by the National Heart, Lung, and Blood Institute (NHLBI).
The researchers examined outcomes for more than 1 million patients at nearly 4,000 hospitals in both urban and rural areas who had been affected by the closure or opening of an ED. The primary measures were 30-day, 90-day, and 1-year mortality rates, and 30-day readmission rates for heart attack. The researchers chose heart attacks because of the known benefits of timely treatment.
The researchers used changes in driving time between an ED and the next-closest one as a proxy for a closure or opening. If driving time increased, it meant a nearby ED had closed.
They found that when it took an additional 30 minutes or more to get to another hospital, the 1-year mortality rate in those receiving hospitals increased by 8% and the 30-day readmission rate by 6%. The likelihood of patients receiving an angioplasty or stent dropped by 4%.
However, the researchers also found that when an ED opened, the patients in the bystander hospitals benefited, experiencing a reduction in 1-year mortality by 5%. And the likelihood of their receiving percutaneous coronary intervention improved by 12%.
The study is believed to be the first to evaluate the impact of ED openings and closures on other hospitals. The lead author of the study, Renee Hsia, MD, said, “We now have evidence that hospital closures affect other hospitals, and they do so in different ways. Hospitals that are already crowded will likely be unable to maintain the same quality when a nearby emergency department closes.”
Limited resources at high-occupancy hospitals make them “sensitive to changes” in neighboring communities, the researchers say. “Hospital closures stress the health care infrastructure,” says Nicole Redmond, MD, PhD, MPH, a medical officer at NHLBI, “especially if the hospital is already caring for a socially and medically complex patient population and working at full capacity. As a result, such closures may inadvertently increase the health disparities that we are trying to mitigate.”