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Quality of Life Research

Gepubliceerd in:

17-09-2022

Flexible modeling of longitudinal health-related quality of life data accounting for informative dropout in a cancer clinical trial

Auteurs: Audrey Winter, Benjamin Cuer, Thierry Conroy, Beata Juzyna, Sophie Gourgou, Caroline Mollevi, Célia Touraine

Gepubliceerd in: Quality of Life Research | Uitgave 3/2023

Abstract

Purpose

A joint modeling approach is recommended for analysis of longitudinal health-related quality of life (HRQoL) data in the presence of potentially informative dropouts. However, the linear mixed model modeling the longitudinal HRQoL outcome in a joint model often assumes a linear trajectory over time, an oversimplification that can lead to incorrect results. Our aim was to demonstrate that a more flexible model gives more reliable and complete results without complicating their interpretation.

Methods

Five dimensions of HRQoL in patients with esophageal cancer from the randomized clinical trial PRODIGE 5/ACCORD 17 were analyzed. Joint models assuming linear or spline-based HRQoL trajectories were applied and compared in terms of interpretation of results, graphical representation, and goodness of fit.

Results

Spline-based models allowed arm-by-time interaction effects to be highlighted and led to a more precise and consistent representation of the HRQoL over time; this was supported by the martingale residuals and the Akaike information criterion.

Conclusion

Linear relationships between continuous outcomes (such as HRQoL scores) and time are usually the default choice. However, the functional form turns out to be important by affecting both the validity of the model and the statistical significance.

Trial registration

This study is registered with ClinicalTrials.gov, number NCT00861094.

vorige artikel Therapeutic massage/Tuina for treatment of functional dyspepsia: a systematic review and meta-analysis of randomized controlled trials

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Titel: Flexible modeling of longitudinal health-related quality of life data accounting for informative dropout in a cancer clinical trial
Auteurs: Audrey Winter
Benjamin Cuer
Thierry Conroy
Beata Juzyna
Sophie Gourgou
Caroline Mollevi
Célia Touraine
Publicatiedatum: 17-09-2022
Uitgeverij: Springer International Publishing
Gepubliceerd in: Quality of Life Research / Uitgave 3/2023
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI: https://doi.org/10.1007/s11136-022-03252-6

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Abstract

Purpose

Methods

Results

Conclusion

Trial registration

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