The Hospital Compare website, operated by the Centers for Medicare and Medicaid Services, is meant to help consumers learn about the quality of hospitals, but a recent study contends that the statistical methodology used by Hospital Compare underestimates heart attack or Acute Myocardial Infarction (AMI) mortality rates for small hospitals.

“The underestimation of AMI mortality rates at small hospitals, as seen in Hospital Compare, contradicts previously established research and consistent findings that mortality rates are typically higher at low-volume hospitals,” said Jeffrey Silber, MD, co-author of the study, professor of pediatrics at the Children's Hospital of Philadelphia and professor of health care management at The Wharton School.

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