Longitudinal analysis of health-related quality of life in cancer clinical trials: methods and interpretation of results.
Qual Life Res
; 30(1): 91-103, 2021 Jan.
Article
en En
| MEDLINE
| ID: mdl-32809099
ABSTRACT
PURPOSE:
Health-related quality of life (HRQoL) is assessed by self-administered questionnaires throughout the care process. Classically, two longitudinal statistical approaches were mainly used to study HRQoL linear mixed models (LMM) or time-to-event models for time to deterioration/time until definitive deterioration (TTD/TUDD). Recently, an alternative strategy based on generalized linear mixed models for categorical data has also been proposed the longitudinal partial credit model (LPCM). The objective of this article is to evaluate these methods and to propose recommendations to standardize longitudinal analysis of HRQoL data in cancer clinical trials.METHODS:
The three methods are first described and compared through statistical, methodological, and practical arguments, then applied on real HRQoL data from clinical cancer trials or published prospective databases. In total, seven French studies from a collaborating group were selected with longitudinal collection of QLQ-C30. Longitudinal analyses were performed with the three approaches using SAS, Stata and R software.RESULTS:
We observed concordant results between LMM and LPCM. However, discordant results were observed when we considered the TTD/TUDD approach compared to the two previous methods. According to methodological and practical arguments discussed, the approaches seem to provide additional information and complementary interpretations. LMM and LPCM are the most powerful methods on simulated data, while the TTD/TUDD approach gives more clinically understandable results. Finally, for single-item scales, LPCM is more appropriate.CONCLUSION:
These results pledge for the recommendation to use of both the LMM and TTD/TUDD longitudinal methods, except for single-item scales, establishing them as the consensual methods for publications reporting HRQoL.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Calidad de Vida
/
Neoplasias
Tipo de estudio:
Guideline
/
Observational_studies
/
Qualitative_research
Aspecto:
Patient_preference
Límite:
Female
/
Humans
/
Male
Idioma:
En
Revista:
Qual Life Res
Asunto de la revista:
REABILITACAO
/
TERAPEUTICA
Año:
2021
Tipo del documento:
Article
País de afiliación:
Francia