Appropriate Statistical Treatment of Frequent Emergency Department Visits in Health Services Research

New York State Health Foundation, New York, NY (Hunt)

Division of Emergency Medicine, Department of Medicine, University of California, San Francisco, San Francisco, CA (Weber)

Institute for Health Policy Studies and Department of Medicine, University of California, San Francisco, San Francisco, CA (Showstack)

Research & Evaluation, Robert Wood Johnson Foundation, Princeton, NJ (Colby)

Division of Emergency Medicine, Department of Medicine, University of California, San Francisco, San Francisco, CA (Callaham)