Resurrecting immortal-time bias in the study of readmissions.

Lee A HugarTudor BorzaMary K OerlineBrent K HollenbeckTed A SkolarusBruce L Jacobs
Published in: Health services research (2019)
We found significantly different readmission rates across all surgical procedures when comparing CMS and NSQIP measures. Longer length of stay exacerbated these differences. Uniform outcome measures are needed to eliminate ambiguity and synergize research and policy efforts.