Why the study?
It was unknown whether dual eligibility for Medicare and Medicaid represents a unique domain of social risk or unmeasured clinical risk when adjusting surgical readmission rates.
Does dual eligibility for Medicare and Medicaid increase risk-adjusted all-cause 30-day readmission after surgery in Medicare beneficiaries?
Population
55 651 Medicare beneficiaries undergoing general, vascular, and gynecologic surgery at 62 hospitals in Michigan
Comparison
Dual eligibility for Medicare and Medicaid vs Medicare-only eligibility
Design
Retrospective cohort study
Follow-up
30 days
Authors
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Dual eligibility may proxy unmeasured clinical risk in claims; leaves open whether social risk adjustment adds unique value beyond clinical variables.
Does dual eligibility for Medicare and Medicaid increase risk-adjusted all-cause 30-day readmission after surgery in Medicare beneficiaries?
Dual eligibility for Medicare and Medicaid is associated with higher surgical readmission rates in claims data, but this difference disappears when adjusting for granular clinical risk factors, suggesting it acts as a proxy for unmeasured clinical risk.
Cher et al. (2020) studied this question.
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