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Summarising censored survival data using the mean residual life function
Author(s) -
AlvarezIglesias Alberto,
Newell John,
Scarrott Carl,
Hinde John
Publication year - 2015
Publication title -
statistics in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.996
H-Index - 183
eISSN - 1097-0258
pISSN - 0277-6715
DOI - 10.1002/sim.6431
Subject(s) - residual , statistics , survival analysis , survival function , econometrics , computer science , mathematics , algorithm
The mean residual life function provides a clear and simple summary of the effect of a treatment or a risk factor in units of time, avoiding hazard ratios or probability scales, which require careful interpretation. Estimation of the mean residual life is complicated by the upper tail of the survival distribution not being observed as, for example, patients may still be alive at the end of the follow‐up period. Various approaches have been developed to estimate the mean residual life in the presence of such right censoring. In this work, a novel semi‐parametric method that combines existing non‐parametric methods and an extreme value tail model is presented, where the limited sample information in the tail (prior to study termination) is used to estimate the upper tail behaviour. This approach will be demonstrated with simulated and real‐life examples. Copyright © 2015 John Wiley & Sons, Ltd.