Showing papers on "Zung Self-Rating Depression Scale published in 1998"

Use of the Zung Self-Rating Depression Scale in cancer patients: Feasibility as a screening tool

Abstract: The feasibility, utility and reliability of the Zung Self-Rating Depression Scale (ZSDS) was examined in a large sample of ambulatory cancer patients. This tool and a brief 11-item version of the ZSDS (excluding nine items concerning somatic symptoms), which was developed during the course of the survey, were used to estimate the prevalence of self-reported depressive symptoms. Patient characteristics that may be associated with an increased risk of clinically significant depressive symptoms were also explored. Twenty-five ambulatory oncology clinics affiliated with Community Cancer Care, Inc. enrolled and surveyed 1109 subjects. The alpha coefficients for the ZSDS (0.84) and the Brief ZSDS (0.84) indicated high levels of internal consistency. The overall prevalence of clinically significant depressive symptoms as defined by the ZSDS was 35.9% and by the Brief ZSDS was 31.1%. The ZSDS and the Brief ZSDS were highly correlated (r = 0.92). The medical and demographic variables most associated with clinically significant depressive symptoms were more advanced stage of disease at time of diagnosis, lung cancer as primary tumor type, higher ECOG rating (greater degree of physical disability), and having been prescribed antidepressant medications. The high prevalence of depressive symptoms observed in this study is consistent with rates found in other studies of self-report depression instruments in cancer patients. The initial indicators of internal consistency and validity suggest that the Zung SDS or the brief version may be useful screening tools to identify depressive symptoms in oncology patients.

Applicability and validity of the Major Depression Inventory in patients with Parkinson's disease

Abstract: Since depressive symptoms in patients with Parkinson's disease (PD) fluctuate greatly, two depression questionnaires measuring frequency of symptoms rather than intensity were analyzed in 89 PD patients. Both scales (Zung-SDS and Major Depression Inventory (MDI)) were analyzed for internal validity by means of coefficients of homogeneity and factor analysis. The results showed that the MDI was superior to the Zung-SDS when measuring the dimension of severity of depression in terms of both homogeneity coefficients and factor analysis. The intercorrelation between the two scales was 0.75 (Spearman coefficient). When the scores of MDI were used for diagnosing depression, 11% of the patients had moderate depression by the ICD-10 and 13% of the patients had major depression by the DSM-IV.

Factor structures of the Zung Self-Rating Depression Scale (SDS) for undergraduates.

Abstract: In order to categorize the items of the Zung Self-Rating Depression Scale (SDS) so as to allow the construction of subscales, the Japanese version of the SDS was administered to a total of 2,258 undergraduates. Principal–component analyses of the SDS extracted three factors interpretable as cognitive, affective, and somatic symptoms. The SDS was then administered to 597 undergraduates in order to cross-validate the factor structures. The coefficient of congruence and the goodness-of-fitness index generated by a confirmatory factor analysis showed good cross-validity of the factor structures. © 1998 John Wiley & Sons, Inc. J Clin Psychol 54: 477–487, 1998.