Improving the evaluation of model fit in confirmatory factor analysis: A commentary on Gundy, C.M., Fayers, P.M., Groenvold, M., Petersen, M. Aa., Scott, N.W., Sprangers, M.A.J., Velikov, G., Aaronson, N.K. (2011). Comparing higher-order models for the EORTC QLQ-C30. Quality of Life Research, doi:10.1007/s11136-011-0082-6

2012 ◽  
Vol 21 (9) ◽  
pp. 1619-1621 ◽  
Author(s):  
Cameron N. McIntosh
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Model Fit ◽  
Quality Of Life Research ◽  
Confirmatory Factor ◽  
Eortc Qlq C30 ◽  
Eortc Qlq ◽  
Higher Order Models

scholarly journals Psychometric properties of the WHOQOL-BREF among next of kin to older persons in nursing homes

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Helena Rosén ◽  
Gerd Ahlström ◽  
Annika Lexén
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Nursing Homes ◽  
Confirmatory Factor Analysis ◽  
Older Persons ◽  
Model Fit ◽  
Next Of Kin ◽  
Confirmatory Factor ◽  
Ceiling Effects

Abstract Background The worries of next of kin about their older loved ones in nursing homes can be extensive and can adversely affect their subjective experiences of their own physical, mental and social well-being. It is thus of utmost importance to measure the quality of life of next of kin in a valid and reliable way. Methods The design is a cross-sectional study with psychometric evaluation based on classical test theory in preparation for a planned educational intervention study on palliative care. An abbreviated version of the World Health Organization’s quality-of-life self-assessment instrument WHOQOL, the Swedish WHOQOL-BREF, was completed by 254 next of kin of older persons in 30 nursing homes. Data quality was assessed via the mean, median, item response, missing values, and floor and ceiling effects. Reliability was estimated using Cronbach’s alpha and corrected item-total correlations. Construct validity was estimated by Spearman’s rank correlation, and model fit was assessed using confirmatory factor analysis. Results The rate of missing data was low (less than 2%). Ceiling effects ranged from 11 to 43% and were above 20% for 21 of 24 items. The corrected item-total correlations varied between 0.35 and 0.68 and were thus well above the lower limit of 0.30. Cronbach’s alpha was 0.83, indicating satisfactory internal consistency. The confirmatory factor analysis indicated a fair to close model fit (comparative fit index 0.93, root mean squared error of approximation 0.06). Conclusions The findings suggest that the WHOQOL-BREF may constitute a reliable and valid measure of quality of life for use among next of kin to older persons in nursing homes. When interpreting the results, it is important to assess the ceiling effect, as it may restrict the ability of the WHOQOL-BREF to detect true positive changes in quality of life over time. Trial registration NCT02708498.

From questionnaire to practical application: A quality of life profile for populations with diverse disabilities

2021 ◽  
pp. 140349482098143
Author(s):  
Louise N Jespersen ◽  
Anette Andersen ◽  
Pernille Due ◽  
Annette K Ersbøll ◽  
Mogens T Damsgaard ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Content Validity ◽  
Model Fit ◽  
Improve Quality ◽  
Confirmatory Factor ◽  
Fit Index ◽  
User Friendly

Aims: Existing quality of life questionnaires are either disease specific or generic in their assessment of themes which are perceived important to the quality of life in populations with disabilities. To be able to improve quality of life in a population with diverse disabilities there was a need for a cross-disability instrument. The Electronic Quality of Life (EQOL)-questionnaire was developed to meet this need. It is crucial that such an instrument is validated, easy to use, and interpret by, for example, clinicians and policy planners. This study aims to test the content validity of the EQOL questionnaire and to construct a user-friendly, cross-disability quality of life profile. Methods: To further test the content validity of the EQOL-questionnaire, we conducted field test analyses on 318 individuals (aged 16–64) with self-reported disabilities. Comments on the questionnaire were scrutinised and sorted. A profile with six domains of quality of life was developed. Model fit was evaluated by confirmatory factor analysis and content validity was evaluated based on distributions. Results: The EQOL-questionnaire was found to have an acceptable content validity and respondents from the field test found that it features important themes of quality of life. The confirmatory factor analysis estimated a satisfying model fit by the root-mean-squared error of approximation (0.06), whereas the comparative fit index and goodness of fit index indicated poorer model fit. Graphical charts, with colour categories for user-friendly interpretation, were constructed. Conclusion: By identifying themes reported as problematic, the EQOL-profile can be used to inform and target interventions aiming to improve quality of life in populations with diverse disabilities.

scholarly journals Evaluating the measurement properties of the 26-item Expanded Prostate Cancer Index Composite (EPIC-26) with a multicenter cohort

2019 ◽  
Vol 14 (4) ◽  
Author(s):  
R. Trafford Crump ◽  
Alex Peterson ◽  
Camille Charbonneau ◽  
Kevin V. Carlson ◽  
Jason M. Sutherland ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Prostate Cancer ◽  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Construct Validity ◽  
Localized Prostate Cancer ◽  
Measurement Properties ◽  
Confirmatory Factor ◽  
Ceiling Effects

Introduction: We aimed to evaluate the psychometric properties of the 26-item Expanded Prostate Cancer Index Composite (EPIC-26) for measuring the quality of life in patients treated for localized prostate cancer. The EPIC-26 is a patient-reported outcome instrument recommended for use with patients treated for localized prostate cancer. Methods: This study is based on data collected prospectively between September 2014 and February 2017 in Alberta, Canada. Men were treated with either radical prostatectomy or radiation therapy and administered the EPIC-26. Responses to the EPIC-26 were the primary outcome. Construct validity was measured using confirmatory factor analysis. Reliability was measured using Chronbach’s alpha and item-total correlation. Ceiling and floor effects were also investigated. Results: EPIC-26 response data from 205 participants (prostatectomy =138; radiation=60; both=7) were used in this analysis. The EPIC-26 was administered an average of 33.8 weeks after treatment. The confirmatory factor analysis model did not meet the threshold for adequate fit. Several items had near-zero factor loadings and were non-significant. Four out of the EPIC- 26’s five domains met the acceptable reliability threshold based on Cronbach’s alpha. Ceiling effects were observed in four out of five domains. Conclusions: The EPIC-26 demonstrated poor construct validity, adequate reliability, and large ceiling effects. Several issues were observed, suggesting that the instrument’s five domains were not well-defined by their respective items. The original EPIC’s conceptual framework should be reviewed and the shortened instrument revised to improve its performance for measuring post-treatment quality of life.

Components of quality of life in a sample of patients with lupus: a confirmatory factor analysis and Rasch modeling of the LupusQoL

2017 ◽  
Vol 36 (8) ◽  
pp. 1789-1795 ◽  
Author(s):  
Ana-Belén Meseguer-Henarejos ◽  
Juan-José Gascón-Cánovas ◽  
José-Antonio López-Pina
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Rasch Modeling ◽  
Confirmatory Factor

scholarly journals The Unique Relationship between Quality of Life and Consumer Trust in Market-Related Institutions among Financially Constrained Consumers in a Developing Country

2009 ◽  
Vol 28 (1) ◽  
pp. 56-70 ◽  
Author(s):  
Ahmet Ekici ◽  
Mark Peterson
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Developing Country ◽  
Poverty Line ◽  
Consumer Trust ◽  
Subjective Quality Of Life ◽  
Confirmatory Factor ◽  
Unique Relationship

This study focuses on how relationships among constructs representing (1) consumer trust in market-related institutions (CTMRI), (2) distrust for individuals (DFI), and (3) subjective quality of life (QOL) differ across groups separated by the poverty line in a developing country (Turkey). A comparison of models across the two groups using multisample confirmatory factor analysis indicates that there is a correlation only between CTMRI and QOL for consumers below the poverty line (r = .43); there are no correlations between any of the three constructs for consumers above the poverty line. Accordingly, there is a unique relationship between QOL and CTMRI among financially constrained consumers in a developing country. Below the poverty line, consumers with lower trust in market-related institutions tend to report lower QOL, while those with higher trust in market-related institutions tend to report higher QOL.

Testing the measurement invariance of the EORTC QLQ-C30 across primary cancer sites using multi-group confirmatory factor analysis

2014 ◽  
Vol 24 (1) ◽  
pp. 125-133 ◽  
Author(s):  
D. S. J. Costa ◽  
N. K. Aaronson ◽  
P. M. Fayers ◽  
J. F. Pallant ◽  
G. Velikova ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Measurement Invariance ◽  
Primary Cancer ◽  
Confirmatory Factor ◽  
Eortc Qlq C30 ◽  
Eortc Qlq

scholarly journals Confirmatory factor analysis of the quality of life scale and new proposed factor structure for the quality of life scale-revised

2017 ◽  
Vol 181 ◽  
pp. 117-123 ◽  
Author(s):  
Kim T. Mueser ◽  
Min Kim ◽  
Jean Addington ◽  
Susan R. McGurk ◽  
Sarah I. Pratt ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Factor Structure ◽  
Quality Of Life Scale ◽  
Confirmatory Factor ◽  
Life Scale
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