0-4 usually normal (depending on age, education, other complaints)
5-8 mild depression
8-11 moderate depression
12-15 severe depression
Any of the above can be a symptom of depression. Depression is common and treatable.
Specific medical illnesses and medication side effects can cause depression.
Talk to your primary care doctor or therapist if you experience 5 or more of the above or you just feel depressed.
Geriatric Depression Rating Scale
Brink TL, Yesavage JA, Lum O, Heersema P, Adey MB, Rose TL: Screening tests