Sensitivity analysis for calibrated inverse probability-of-censoring weighted estimators under non-ignorable dropout.

ABSTRACT: Inverse probability of censoring weighting is a popular approach to handling dropout in longitudinal studies. However, inverse probability-of-censoring weighted estimators (IPCWEs) can be inefficient and unstable if the weights are estimated by maximum likelihood. To alleviate these problems, calibrated IPCWEs have been proposed, which use calibrated weights that directly optimize covariate balance in finite samples rather than the weights from maximum likelihood. However, the existing calibrated IPCWEs are all based on the unverifiable assumption of sequential ignorability and sensitivity analysis strategies under non-ignorable dropout are lacking. In this paper, we fill this gap by developing an approach to sensitivity analysis for calibrated IPCWEs under non-ignorable dropout. A simple

SUBMITTER: Su L 

PROVIDER: S-EPMC9253927 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature