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International Journal of Social Psychiatry
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Reliability and Factor Structure of the Portuguese Version of Self-Reporting Questionnaire

Eduardo Iacoponi

General Practice Research Unit, Institute of Psychiatry, London SE5, UK

Jair de Jesus Mari

CNPQ II-C, Department of Psychiatry, Escola Paulista de Medicina

The Self-Reporting Questionnaire is a screening instrument devised by the WHO to identify minor psychiatric morbidity in primary care settings and the community in developing countries. It has already been widely used although its psychometric properties are not yet completely explained. The present article describes the following properties of the Portuguese version of the SRQ-20: a) coefficients of internal consistency; b) inter-rater reliability coefficients, and c) a factor analysis. Internal consistency, measured by the KD20 method, was 0.81. The intra-class correlation coefficient obtained from simultaneous scoring of four interviewers was 0.96, considerably high, as expected from a structured instrument. In the factor analysis four main factors accounted for 41% of the total item variance, and they could be reasonably identified as Decreased Energy, Somatic symptoms, Depressive mood and Depressive thoughts.

International Journal of Social Psychiatry, Vol. 35, No. 3, 213-222 (1989)
DOI: 10.1177/002076408903500301
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S. Chen, G. Zhao, L. Li, Y. Wang, H. Chiu, and E. Caine
Psychometric Properties of the Chinese Version of the Self-Reporting Questionnaire 20 (SRQ-20) in Community Settings
International Journal of Social Psychiatry, November 1, 2009; 55(6): 538 - 547.
[Abstract] [PDF]