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01-08-2013 | Brief Communication | Uitgave 6/2013

Quality of Life Research 6/2013

Validation of the WHOQOL-BREF quality of life questionnaire for general use in New Zealand: confirmatory factor analysis and Rasch analysis

Tijdschrift:
Quality of Life Research > Uitgave 6/2013
Auteurs:
Christian U. Krägeloh, Paula Kersten, D. Rex Billington, Patricia Hsien-Chuan Hsu, Daniel Shepherd, Jason Landon, Xuan Joanna Feng

Abstract

Purpose

The present study validated the abbreviated version of the World Health Organization Quality of Life (WHOQOL-BREF) questionnaire for general use in New Zealand.

Methods

A random postal sample from the national electoral roll was used, and 808 questionnaires were returned. Psychometric properties of the instrument were assessed, including tests of the four-domain factor structure using confirmatory factor analysis and Rasch analysis.

Results

Goodness-of-fit from the confirmatory factor analysis were good, and the overall conclusion of the Rasch analysis supported the confirmatory factor analysis (CFA) findings after dealing with problems of threshold ordering, local dependency, and differential item functioning (DIF).

Conclusions

The WHOQOL-BREF is valid for general use in New Zealand. In the future work, the WHOQOL-BREF domain scores should either be analyzed using non-parametric statistics or data should be fitted to the Rasch model to derive interval person estimates.

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