I suggest you include the PHQ-9 questionnaire, it is very useful and very sensitive test for the day-to-day clinical use.

Depression scale

Screen for depression and suicide

Creative post . Apropos , if anyone needs to fill out a PHQ-9 A2663B , We encountered a fillable form here http://goo.gl/ua9i3M

Depression questionnaire

Gds is a Geriatric Depression Scale, Not a Scale for Dementia!
The Geriatric Depression Scale (GDS) is a 30-item self-report assessment used to identify depression in the elderly. The scale was first developed in 1982 by J.A. Yesavage and others.[1]