The Zung Self-Rating Depression Scale was designed by Duke University psychiatrist William W.K. Zung MD (1929-1992) to assess the level of depression for patients diagnosed with depressive disorder.
The Zung Self-Rating Depression Scale is a short self-administered survey to quantify the depressed status of a patient. There are 30 items on the scale that rate the affective, psychological and somatic symptoms associated with depression.
There are ten positively worded and ten negatively worded questions. Each question is scored on a scale of 1 through 4 (based on these replies: "a little of the time", "some of the time", "good part of the time", "most of the time").
Scores on the test range from 20 through 80. The scores fall into four ranges:20-44 Normal Range
45-59 Mildly Depressed
60-69 Moderately Depressed
70 and above Severely Depressed
The Zung Self-Rating Depression Scale has been translated into many languages, including Arabic, Azerbaijani, Dutch, German, Portuguese, and Spanish.