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Quality of Life Research
Gepubliceerd in: Quality of Life Research 2/2011

01-03-2011

Understanding the relationships between health outcomes in generalized anxiety disorder clinical trials

Auteurs: Kathleen W. Wyrwich, Neesha Harnam, Julie C. Locklear, Henrik Svedsäter, Dennis A. Revicki

Gepubliceerd in: Quality of Life Research | Uitgave 2/2011

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Abstract

Background and Aims

The Wilson–Cleary health outcomes model is a hypothesized pathway linking traditional clinical variables to health-related quality of life (HRQL). This study tested the application of the Wilson–Cleary model to a patient population with generalized anxiety disorder (GAD) using longitudinal clinical trial data.

Methods

These secondary analyses pooled data from three similar 8-week, placebo-controlled, double-blind, randomized, multicenter trials of quetiapine XR therapy in GAD. Relevant health assessments for the model concepts included the Clinical Global Impression-Severity of Illness, Hamilton Rating Scale for Anxiety, the Pittsburgh Sleep Quality Index and Quality of Life Enjoyment and Satisfaction Questionnaire-Short Form. A lagged path model tested whether the hypothesized relationships at baseline and week 8 between the concepts of the adapted Wilson–Cleary model were consistent with the observed data.

Results

The resulting model fit the data (RMSEA = 0.077; CFI = 0.98; NFI = 0.96) and explained 56% of the variance in overall quality of life assessment at baseline and 69% of the variance in this assessment at week 8. Moderate to strong relationships between the adjacent hypothesized concepts support the specified model.

Conclusion

This adapted Wilson–Cleary model for health outcomes validated in GAD should improve the understanding and usefulness of health status measurements in this condition and increase the applications of this model to other clinical trial data.
vorige artikel Erratum to: The PedsQL in pediatric cerebral palsy: reliability and validity of the Chinese version pediatric quality of life inventory 4.0 generic core scales and 3.0 cerebral palsy module
volgende artikel The RSM-scale: a pilot study on a new specific scale for self- and observer-rated quality of life in patients with schizophrenia
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Metagegevens
Titel
Understanding the relationships between health outcomes in generalized anxiety disorder clinical trials
Auteurs
Kathleen W. Wyrwich
Neesha Harnam
Julie C. Locklear
Henrik Svedsäter
Dennis A. Revicki
Publicatiedatum
01-03-2011
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 2/2011
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-010-9734-1

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