Zung Self-Rating Depression Scale

The Zung Self-Rating Depression Scale was designed by WW. Zung 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 20 items on the scale that rate the four common characteristics of depression: the pervasive effect, the physiological equivalents, other disturbances, and psychomotor activities.

There are ten positively worded and ten negatively worded questions. Each question is scored on a scale of 1-4 (a little of the time, some of the time, good part of the time, most of the time).

The scores range from 25-100.


 * 25-49 Normal Range
 * 50-59 Mildly Depressed
 * 60-69 Moderately Depressed
 * 70 and above Severely Depressed