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Quality of Life Research

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Gepubliceerd in: Quality of Life Research 6/2013

01-08-2013

Factor analytic and item response theory evaluation of the Penn State Worry Questionnaire in women with cancer

Auteurs: Salene M. Wu, Tammy A. Schuler, Michael C. Edwards, Hae-Chung Yang, Brittany M. Brothers

Gepubliceerd in: Quality of Life Research | Uitgave 6/2013

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Abstract

Purpose

Cancer survivors frequently experience worry about a variety of topics, including fear of recurrence. However, general measures of worry still require examination of reliability for this vulnerable population. This study utilized modern psychometric methods to examine the reliability of a worry measure in women with breast or gynecologic cancer.

Methods

Women with cancer (n = 332) completed the 16-item Penn State Worry Questionnaire (PSWQ), which has an abbreviated 8-item version (PSWQ-A). Categorical confirmatory factor analysis (CCFA) was used to determine the factor structure and item response theory (IRT) was used to examine score reliability.

Results

CCFA supported a two-factor structure with 11 positively worded items and the 5 negatively worded items loading on different factors. IRT analysis of the 11 positively worded items showed that each was contributing meaningful information to the overall scores. The 11 positively worded items and the PSWQ-A produced the most reliable scores for levels of worry ranging from one θ below to two θ above the mean.

Conclusions

The 11 positively worded items of the PSWQ and the 8-item PSWQ-A were suitable for use in cancer patients while the full PSWQ was unsuitable due to inclusion of the negatively worded items. Future research should consider measuring worry when examining distress in cancer survivors.
vorige artikel Score equivalence of electronic and paper versions of the Social Difficulties Inventory (SDI-21): a randomised crossover trial in cancer patients
volgende artikel Validation of the WHOQOL-BREF quality of life questionnaire for general use in New Zealand: confirmatory factor analysis and Rasch analysis
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Metagegevens
Titel
Factor analytic and item response theory evaluation of the Penn State Worry Questionnaire in women with cancer
Auteurs
Salene M. Wu
Tammy A. Schuler
Michael C. Edwards
Hae-Chung Yang
Brittany M. Brothers
Publicatiedatum
01-08-2013
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 6/2013
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-012-0253-0

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