Does Favorable Selection Among Medicare Advantage Enrollees Affect Measurement of Hospital Readmission Rates?

Published

Journal Article

Literature indicates favorable selection among Medicare Advantage (MA) enrollees compared with fee-for-service (FFS) enrollees. This study examined whether favorable selection into MA affected readmission rates among Medicare-eligible veterans following hospitalization for congestive heart failure in the Veterans Affairs Health System (VA). We measured total (VA + Medicare FFS) 30-day all-cause readmission rates across hospitals and all of VA. We used Heckman's correction to adjust readmission rates to be representative of all Medicare-eligible veterans, not just FFS-enrolled veterans. The adjusted all-cause readmission rate among FFS veterans was 27.1% (95% confidence interval [CI] = 26.5% to 27.7%), while the adjusted readmission rate among Medicare-eligible veterans was 25.3% (95% CI = 23.6% to 27.1%) after correcting for favorable selection. Readmission rate estimates among FFS veterans generalize to all Medicare-eligible veterans only after accounting for favorable selection into MA. Estimation of quality metrics should carefully consider sample selection to produce valid policy inferences.

Full Text

Duke Authors

Cited Authors

  • Wong, ES; Hebert, PL; Maciejewski, ML; Perkins, M; Bryson, CL; Au, DH; Liu, C-F

Published Date

  • August 2014

Published In

Volume / Issue

  • 71 / 4

Start / End Page

  • 367 - 383

PubMed ID

  • 24811933

Pubmed Central ID

  • 24811933

Electronic International Standard Serial Number (EISSN)

  • 1552-6801

Digital Object Identifier (DOI)

  • 10.1177/1077558714533823

Language

  • eng

Conference Location

  • United States