Factorial Validity and Invariance of the GHQ-12 among Clinical and Nonclinical Samples

Autor/inn/en	Fernandes, Helder Miguel; Vasconcelos-Raposo, Jose
Titel	Factorial Validity and Invariance of the GHQ-12 among Clinical and Nonclinical Samples
Quelle	In: Assessment, 20 (2013) 2, S.219-229 (11 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1073-1911
DOI	10.1177/1073191112465768
Schlagwörter	Health; Questionnaires; Chronic Illness; Patients; Reliability; Factor Analysis; College Students; Goodness of Fit; Factor Structure; Foreign Countries; Comparative Analysis; Measurement Techniques; Brazil + Suchen Sie Ihr Suchwort? Gesundheit; Fragebogen; Chronic disease; Chronische Krankheit; Patient; Reliabilität; Faktorenanalyse; Collegestudent; Faktorenstruktur; Ausland; Messtechnik; Brasilien
Abstract	The purpose of this study was to examine the internal reliability, factorial validity, and measurement invariance of a Brazilian-Portuguese version of the General Health Questionnaire-12 (GHQ-12) across clinical and nonclinical groups. The clinical sample consisted of 228 chronic hemodialysis patients (41.7% female), with a mean age of 48.23 (SD = 16.02) years, whereas the nonclinical sample comprised 350 university students (59.1% female), with a mean age of 21.15 (SD = 2.04) years. Initial model fit comparison of 16 factor structures reported in the literature, through confirmatory factor analysis (CFA), provided mixed results. Additional revisions based on CFA modification indices demonstrated that a reduced (8-item) one-factor model with three error covariances provided the best fit to the data in both samples (comparative fit index greater than 0.98 and root mean square error of approximation less than .05) and acceptable internal reliability estimates (greater than 0.70). Pearson's correlations between the original and the reduced scale was 0.96 for both samples. Multigroup analysis supported partial strong measurement equivalence across groups. Latent mean differences showed an expected higher factor mean for the clinical sample. Overall results demonstrated that the 8-item one-factor of the GHQ-12 showed good psychometric properties in both samples and provided preliminary support for meaningful comparisons of factor means across clinical and nonclinical groups. (Contains 3 tables and 1 figure.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10