|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5652298||1407210||2018||5 صفحه PDF||سفارش دهید||دانلود کنید|
ObjectiveTo validate the factor structure of the Patient Health Questionnaire Anxiety and Depression Scale (PHQ-ADS)- which is a composite measure of depression and anxiety using the Patient Health Questionnaire-9 and Generalised Anxiety Disorder Scale (GAD-7), in a sample of haemodialysis patients.MethodScreening data (nÂ =Â 182) used to select entry into a feasibility study of an online cognitive-behavioural therapy intervention for distress in dialysis patients were analysed here. Structural validity of the PHQ-ADS was evaluated using confirmatory factor analysis (CFA), assessing alternative models including a bi-factor model. In the bi-factor model all items from the PHQ-9 and GAD-7 (16-items in total) were loaded onto a general distress factor. Respective items of the PHQ-9 and GAD-7 were specified as subgroup factors. Omega-hierarchical was calculated to indicate the level of saturation of a multidimensional scale by a general factor. Construct validity was determined against the Brief Illness Perception Questionnaire.ResultsA bi-factor PHQ-ADS model had good fit to the data (chi-squareÂ =Â 96.1, pÂ =Â 0.26, CFIÂ =Â 0.99; TLIÂ =Â 0.99; RMSEAÂ =Â 0.02). The general distress factor accounted for approximately 84% of the explained variance (omega-hÂ =Â 0.90). Distress scores were significantly higher in females compare with males. There was a significant association between distress and negative illness perceptions (rÂ =Â 0.58, pÂ <Â 0.01).ConclusionsThe PHQ-ADS appears to have good structural validity in haemodialysis patients and is sufficiently unidimensional to warrant the use of a total distress score. A full psychometric analysis of the PHQ-ADS in a larger sample of dialysis patients is warranted.
Journal: General Hospital Psychiatry - Volume 50, JanuaryâFebruary 2018, Pages 15-19