Idem: An R package for inferences in clinical trials with death and missingness

Research output: Contribution to journalArticlepeer-review

Abstract

In randomized controlled trials of seriously ill patients, death is common and often defined as the primary endpoint. Increasingly, non-mortality outcomes such as functional outcomes are co-primary or secondary endpoints. Functional outcomes are not defined for patients who die, referred to as “truncation due to death”, and among survivors, functional outcomes are often unobserved due to missed clinic visits or loss to follow-up. It is well known that if the functional outcomes “truncated due to death” or missing are handled inappropriately, treatment effect estimation can be biased. In this paper, we describe the package idem that implements a procedure for comparing treatments that is based on a composite endpoint of mortality and the functional outcome among survivors. Among survivors, the procedure incorporates a missing data imputation procedure with a sensitivity analysis strategy. A web-based graphical user interface is provided in the idem package to facilitate users conducting the proposed analysis in an interactive and user-friendly manner. We demonstrate idem using data from a recent trial of sedation interruption among mechanically ventilated patients.

Original languageEnglish (US)
Pages (from-to)1-35
Number of pages35
JournalJournal of Statistical Software
Volume93
Issue number12
DOIs
StatePublished - 2020

Keywords

  • Clinical trial
  • Composite endpoint
  • Imputation
  • Missing data
  • R
  • SACE
  • Sensitivity analysis
  • Shiny
  • Stan
  • Truncation due to death

ASJC Scopus subject areas

  • Software
  • Statistics and Probability
  • Statistics, Probability and Uncertainty

Fingerprint Dive into the research topics of 'Idem: An R package for inferences in clinical trials with death and missingness'. Together they form a unique fingerprint.

Cite this