• Maureen A Smith, Jennifer R Frytak, Jinn-Ing Liou, and Michael D Finch.
• Department of Population Health Sciences, University of Wisconsin-Madison Medical School, Madison, Wisconsin 53705-2397, USA. maureensmith@wisc.edu
• Med Care. 2005 Sep 1;43(9):902-10.

BackgroundStroke affects more than 500,000 older persons each year in the United States, but no studies have compared older stroke patients in Medicare health maintenance organizations (HMOs) and fee-for-service (FFS) after recent changes in FFS reimbursement.ObjectivesWe sought to compare utilization and outcomes after stroke in Medicare HMO and FFS.DesignWe reviewed administrative data in 11 regions from Medicare and a large national health plan.SubjectsWe studied Medicare beneficiaries 65 years and older discharged with ischemic stroke during 1998-2000, ie, 4816 HMO patients and a random sample of 4187 FFS patients from 422 hospitals.MeasuresWe measured survival, rehospitalization, length of stay, discharge destination, and warfarin use.ResultsOverall, HMO patients were younger, male, non-Caucasian, and had fewer comorbid conditions. When compared with FFS patients, HMO patients were more likely to be rehospitalized within 30 days for a primary diagnosis of ischemic stroke (Adjusted Hazard Ratio = 1.45, 95% Confidence Interval [CI] 1.14-1.83) or ill-defined conditions (eg, rehabilitation services) (2.87, 95% CI 1.85-4.46) and less likely to be rehospitalized for fluid and electrolyte disorders (0.54, 95% CI 0.34-0.87) or circulatory/respiratory problems (0.77, 95% CI 0.60-0.98). There were no consistent differences in 30-day mortality or in 1-year rehospitalization or mortality for 30-day survivors. HMO patients also were much less likely to be discharged to rehabilitation facilities, slightly less likely to be discharged to skilled nursing facilities and to have a shorter length of stay, and did not differ in the use of home care services or warfarin use when compared with FFS patients.ConclusionsTraditional measures of quality such as 30-day rehospitalization may not be valid when comparing HMO and FFS patients if differences might reflect an alternative service mix. Utilization of post-acute care for FFS patients appears similar to HMO patients except for discharge to rehabilitation facilities.

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