Some insight on censored cost estimators

H. Zhao, Y. Cheng, Heejung Bang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Censored survival data analysis has been studied for many years. Yet, the analysis of censored mark variables, such as medical cost, quality-adjusted lifetime, and repeated events, faces a unique challenge that makes standard survival analysis techniques invalid. Because of the 'informative' censorship imbedded in censored mark variables, the use of the Kaplan-Meier (Journal of the American Statistical Association 1958; 53:457-481) estimator, as an example, will produce biased estimates. Innovative estimators have been developed in the past decade in order to handle this issue. Even though consistent estimators have been proposed, the formulations and interpretations of some estimators are less intuitive to practitioners. On the other hand, more intuitive estimators have been proposed, but their mathematical properties have not been established. In this paper, we prove the analytic identity between some estimators (a statistically motivated estimator and an intuitive estimator) for censored cost data. Efron (1967) made similar investigation for censored survival data (between the Kaplan-Meier estimator and the redistribute-to-the-right algorithm). Therefore, we view our study as an extension of Efron's work to informatively censored data so that our findings could be applied to other marked variables.

Original languageEnglish (US)
Pages (from-to)2381-2388
Number of pages8
JournalStatistics in Medicine
Volume30
Issue number19
DOIs
StatePublished - Aug 30 2011
Externally publishedYes

Fingerprint

Survival Analysis
Estimator
Costs and Cost Analysis
Costs
Censored Survival Data
Intuitive
Kaplan-Meier
Kaplan-Meier Estimator
Consistent Estimator
Censored Data
Biased
Lifetime
Data analysis
Formulation
Estimate

Keywords

  • Inverse-probability weighting
  • Marked process
  • Medical cost
  • Redistribute-to-the-right
  • Replace-from-the-right
  • Survival analysis

ASJC Scopus subject areas

  • Epidemiology
  • Statistics and Probability

Cite this

Some insight on censored cost estimators. / Zhao, H.; Cheng, Y.; Bang, Heejung.

In: Statistics in Medicine, Vol. 30, No. 19, 30.08.2011, p. 2381-2388.

Research output: Contribution to journalArticle

Zhao, H. ; Cheng, Y. ; Bang, Heejung. / Some insight on censored cost estimators. In: Statistics in Medicine. 2011 ; Vol. 30, No. 19. pp. 2381-2388.
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