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Background and Objective. The purpose of this retrospective observational study was to examine the influence of severe obesity on length of stay (LOS), rehabilitation efficiency, and hospital costs post-acute rehabilitation in a population-based, tertiary care, publicly-funded regional rehabilitation center. Participants. 42 severely obese subjects (mean age 53 y; mean BMI 50.9 kg/m2) and 42 nonobese controls (mean age 59 y; mean BMI 23.0 kg/m2) matched by sex and admitting diagnosis. Main Outcome Measures. Total LOS, rehab LOS, waiting for transfer LOS, Fuctional Independence Measure (FIM) efficiency, and hospital costs. Results. Compared to controls, severely obese subjects experienced longer total LOS (98.4 vs. 37.4 days; P=0.03), rehabilitation LOS (55.8 vs. 37.4 days; P=0.04), and waiting for transfer LOS (42.6 vs. 0 days; P=0.006); increased hospital costs ($115,822 vs. $43,969; P=0.03); and similar FIM efficiency (0.58 vs. 0.67; P=0.27). Severe obesity was an independent predictor of total LOS (beta-coefficient 0.51; P=0.03), rehab LOS (0.46; P=0.02) but not FIM efficiency (−0.63; P=0.06). Conclusion. Severe obesity adversely affects rehabilitation LOS and expenditures. Targeted interventions in severely obese individuals to optimize post-acute rehabilitation care delivery are needed

The Impact of Severe Obesity on Post-Acute Rehabilitation Efficiency, Length of Stay, and Hospital Costs