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The EUROHIS-QOL 8-item index: comparative psychometric properties to its parent WHOQOL-BREF.
Value Health. 2012 May; 15(3):449-57.VH

Abstract

OBJECTIVES

To test the psychometric properties of the EUROHIS-QOL 8-item index, a shortened version of the World Health Organization Quality of Life Instrument-Abbreviated Version (WHOQOL-BREF).

METHODS

The sample consisted of 2359 subjects identified from primary care settings, with 1193 having a confirmed diagnosis of depression. Data came from six countries (Australia, Brazil, Israel, Russia, Spain, and the United States) involved in a large international study, the Longitudinal Investigation of Depression Outcomes. The structure of the EUROHIS-QOL 8-item index follows that of the WHOQOL-BREF assessment. Internal consistency was measured by using Cronbach's alpha. Convergent validity was assessed by using correlations with different measures for mental health (Symptom Checklist 90), physical health (self-evaluation), and quality of life (WHOQOL-BREF and short form 36 health survey). Discriminant group validity was assessed between diagnosed depressed and nondepressed patients. Differential item functioning and unidimensionality were analyzed by using Rasch analysis. Factor structure was assessed with structural equation modeling analyses.

RESULTS

Internal consistency was acceptable (ranged between 0.72 and 0.81 across countries), and the index discriminated well between depression (t = 6.31-20.33; P < 0.001) across all countries. Correlations between the EUROHIS-QOL 8-item index and different measures--Symptom Checklist 90 (r = -0.42), physical health (r = -0.42), WHOQOL-BREF domains (r = 0.61-0.77), and short form 36 health survey (r = 0.58)--were all significant (P < 0.001). The index is unidimensional with desired item fit statistics. Two items ("daily living activities" and "enough money to meet your needs") had residuals exceeding 4. Differential item functioning was observed with general quality of life, general health, relationships, and home items for age. A common one-factor structure with acceptable fit was identified in three out of six countries (comparative fit index = 0.85, root mean square error of approximation = 0.11).

CONCLUSIONS

The EUROHIS-QOL 8-item index showed acceptable cross-cultural performance and a satisfactory discriminant validity and would be a useful measure to include in studies to assess treatment effectiveness.

Authors+Show Affiliations

Graduate Program in Medical Sciences: Psychiatry-UFRGS, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil. neusa-rocha@via-rs.netNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Validation Study

Language

eng

PubMed ID

22583455

Citation

da Rocha, Neusa Sica, et al. "The EUROHIS-QOL 8-item Index: Comparative Psychometric Properties to Its Parent WHOQOL-BREF." Value in Health : the Journal of the International Society for Pharmacoeconomics and Outcomes Research, vol. 15, no. 3, 2012, pp. 449-57.
da Rocha NS, Power MJ, Bushnell DM, et al. The EUROHIS-QOL 8-item index: comparative psychometric properties to its parent WHOQOL-BREF. Value Health. 2012;15(3):449-57.
da Rocha, N. S., Power, M. J., Bushnell, D. M., & Fleck, M. P. (2012). The EUROHIS-QOL 8-item index: comparative psychometric properties to its parent WHOQOL-BREF. Value in Health : the Journal of the International Society for Pharmacoeconomics and Outcomes Research, 15(3), 449-57. https://doi.org/10.1016/j.jval.2011.11.035
da Rocha NS, et al. The EUROHIS-QOL 8-item Index: Comparative Psychometric Properties to Its Parent WHOQOL-BREF. Value Health. 2012;15(3):449-57. PubMed PMID: 22583455.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The EUROHIS-QOL 8-item index: comparative psychometric properties to its parent WHOQOL-BREF. AU - da Rocha,Neusa Sica, AU - Power,Mick J, AU - Bushnell,Donald M, AU - Fleck,Marcelo P, Y1 - 2012/02/09/ PY - 2011/04/09/received PY - 2011/10/17/revised PY - 2011/11/21/accepted PY - 2012/5/16/entrez PY - 2012/5/16/pubmed PY - 2012/7/7/medline SP - 449 EP - 57 JF - Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research JO - Value Health VL - 15 IS - 3 N2 - OBJECTIVES: To test the psychometric properties of the EUROHIS-QOL 8-item index, a shortened version of the World Health Organization Quality of Life Instrument-Abbreviated Version (WHOQOL-BREF). METHODS: The sample consisted of 2359 subjects identified from primary care settings, with 1193 having a confirmed diagnosis of depression. Data came from six countries (Australia, Brazil, Israel, Russia, Spain, and the United States) involved in a large international study, the Longitudinal Investigation of Depression Outcomes. The structure of the EUROHIS-QOL 8-item index follows that of the WHOQOL-BREF assessment. Internal consistency was measured by using Cronbach's alpha. Convergent validity was assessed by using correlations with different measures for mental health (Symptom Checklist 90), physical health (self-evaluation), and quality of life (WHOQOL-BREF and short form 36 health survey). Discriminant group validity was assessed between diagnosed depressed and nondepressed patients. Differential item functioning and unidimensionality were analyzed by using Rasch analysis. Factor structure was assessed with structural equation modeling analyses. RESULTS: Internal consistency was acceptable (ranged between 0.72 and 0.81 across countries), and the index discriminated well between depression (t = 6.31-20.33; P < 0.001) across all countries. Correlations between the EUROHIS-QOL 8-item index and different measures--Symptom Checklist 90 (r = -0.42), physical health (r = -0.42), WHOQOL-BREF domains (r = 0.61-0.77), and short form 36 health survey (r = 0.58)--were all significant (P < 0.001). The index is unidimensional with desired item fit statistics. Two items ("daily living activities" and "enough money to meet your needs") had residuals exceeding 4. Differential item functioning was observed with general quality of life, general health, relationships, and home items for age. A common one-factor structure with acceptable fit was identified in three out of six countries (comparative fit index = 0.85, root mean square error of approximation = 0.11). CONCLUSIONS: The EUROHIS-QOL 8-item index showed acceptable cross-cultural performance and a satisfactory discriminant validity and would be a useful measure to include in studies to assess treatment effectiveness. SN - 1524-4733 UR - https://www.unboundmedicine.com/medline/citation/22583455/The_EUROHIS_QOL_8_item_index:_comparative_psychometric_properties_to_its_parent_WHOQOL_BREF_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1098-3015(11)03665-5 DB - PRIME DP - Unbound Medicine ER -