Clinical and sociodemographic risk factors for readmission of Medicare beneficiaries.

In a random sample of Medicare beneficiaries, multiple logistic regression was used to examine clinical, sociodemographic, and insurance coverage risk factors for readmission within 60 days of discharge. The patients most likely to be readmitted were those with poor health status or with chronic diseases and those who had not had surgery. Age, marital status, living situation, and having insurance to supplement Medicare were not independently predictive of readmission risk. The dominant roles of health status, diagnosis, and surgery as predictors of readmission provide evidence that risk-adjusted readmission rates can be equitably used for quality of care studies.