What does ZDS stand for?
ZDS stands for Zung's Depression Scale
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This depression test is based on Zung's Self-Rating Depression Scale. It is being provided by Depression Treatment Now for informational purposes only. The results of this depression test should not be used as a replacement for assessment by a qualified health care professional.
The Center for Epidemiological Studies- Depression Scale (CES-D)  is a well known and widely used self-rating scale for the measurement of depression. Along with the Beck Depression Inventory  and the Zung Depression Rating Scale , these are the most popular self-administered instruments for the assessment of depression. These scales are supposed to be used as screening tools rather and not as substitutes for an in-depth interview .
Despite the high incidence of depression in our sample, VAS scores did not correlate with Zung's depression scale, whereas MFIS showed low correlation (0. 3). Depression is often related to fatigue [20-27], but the causality of this relationship is not clear. In general, depressed individuals show higher fatigue levels; having disabling fatigue on its turn may culminate in depression. In our sample, no higher VAS-scores were found in the depressed group, however.
7,8Students' perception of extensive course load9 is also reported to cause exam anxiety in medical students. Examination system10 itself is a major stress for students. 2 At Dow Medical College, final year M,B;B,S exams consist of nine theory and six viva voce exams with two to three days gap in between each paper. It leads to total duration of eight to nine weeks which makes it an exam of nerves rather than knowledge. Anxiety and stress levels among medical students have been assessed using different scales including General Health Questionnaire by Jenny Firth11, Spilberger's Test Anxiety Inventory by Rosal MC et al12, Zung's depression scale.
Characteristics of depression in Parkinson's disease: evaluating with Zung's Self-Rating Depression Scale.