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Retolaza Balsategui A.,Red de Salud Mental de Bizkaia RSMB | Ballesteros Rodriguez J.,University of the Basque Country
Atencion Primaria

Objective: To develop a new scaled GHQ version (GHQ-28) for use in Primary Care in Spain. Design: Principal components analysis of the parental version (GHQ-60) with subsequent selection of 7 items with higher loadings for the first 4 components. Site: Three Primary Care Centres in the metropolitan area of Bilbao. Participants: A total of 202 patients coming from a prior study on frequent visits to Primary Care clinics. Main measurements: Comparison between the new and the authorised version of GHQ-28 in discriminating between psychiatric and non-psychiatric cases, diagnosed independently by psychiatric interview. Results: Whereas the structure of two scales was similar to that described previously, the other two scales showed higher variability with the inclusion of new items and a combination of others previously ascribed to different measurement constructs. No significant difference (P =.63) was observed between both versions regarding their discriminant validity. Conclusions: The most stable GHQ-28 scales were social dysfunction and depression. The variability found among the other scales could be explained by the non-specificity of psychiatric symptoms presented in Primary Care. © 2010 Elsevier España, S.L. All rights reserved. Source

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