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Comparing the Survival Analysis of Two or More Groups

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Related Experiment Video

Updated: Jun 1, 2026

E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
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Effect of patient selection method on provider group performance estimates.

Carolyn T Thorpe1, Grace E Flood, Sally A Kraft

  • 1Department of Population Health Sciences, University of Wisconsin, Madison, WI 53705, USA. cthorpe@wisc.edu

Medical Care
|May 28, 2011
PubMed
Summary

Patient selection methods for provider group performance significantly impact case mix and results. The Diabetes Care Home method, compared to the Plurality Provider Algorithm, selected different patient groups and showed higher performance metrics for diabetes care.

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06:55

Inverse Probability of Treatment Weighting (Propensity Score) using the Military Health System Data Repository and National Death Index

Published on: January 8, 2020

Area of Science:

  • Health Services Research
  • Medical Informatics
  • Healthcare Quality Improvement

Background:

  • Provider group performance measurement is increasingly advocated.
  • Evaluation of patient selection methods for performance calculation is limited.
  • Different patient selection methods can influence performance estimates.

Purpose of the Study:

  • To compare two patient selection methods: Plurality Provider Algorithm and Diabetes Care Home.
  • To analyze the characteristics of patients selected by each method.
  • To assess the impact of patient selection on performance estimates for diabetes care.

Main Methods:

  • Analysis of Medicare claims data for fee-for-service beneficiaries with diabetes.
  • Comparison of patient groups selected by Plurality Provider Algorithm and Diabetes Care Home methods.
  • Examination of sociodemographics, clinical characteristics, and receipt of diabetes monitoring.

Main Results:

  • The Diabetes Care Home method selected fewer patients (n=3558) than the Plurality Provider Algorithm (n=4859).
  • Diabetes Care Home preferentially selected older, female patients with hypertension, and fewer with kidney or peripheral vascular disease.
  • Higher performance was observed under the Diabetes Care Home method for A1c tests, LDL tests, and eye examinations.

Conclusions:

  • Patient selection methods influence provider group case mix and performance metrics.
  • Careful consideration of patient selection is crucial when comparing performance estimates.
  • The choice of method can lead to different conclusions about provider group quality.