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Claire Zizza, PhD, Amy H. Herring, ScD, June Stevens, PhD and Barry M. Popkin, PhD

Claire Zizza is with the Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill. Amy H. Herring is with the Department of Biostatistics, School of Public Health, University of North Carolina at Chapel Hill. June Stevens is with the Department of Epidemiology and the Department of Nutrition, School of Public Health, University of North Carolina at Chapel Hill. Barry M. Popkin is with the Department of Nutrition and the Carolina Population Center, University of North Carolina at Chapel Hill.

Correspondence: Requests for reprints should be sent to Claire Zizza, PhD, Cecil G. Sheps Center for Health Services Research, 725 Airport Rd, CB #7590, Chapel Hill, NC 27599-7590 (e-mail: claire_zizza{at}unc.edu).

Objectives. We examined lengths of hospital stay among individuals categorized according to weight status.

Methods. We used data from the First National Health and Nutrition Examination Survey Epidemiologic Followup Survey to estimate length-of-stay differences.

Results. Individuals with body mass indexes (BMIs) of 35 kg/m² or above, those with BMIs of 30 to 34 kg/m², and those with BMIs of 25 to 29 kg/m² had crude length-of-stay rates greater than those of normal-weight individuals. Association between BMI and length of stay varied over time.

Conclusions. Obese individuals experience longer hospital stays than normal-weight individuals.

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