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Zung Self-Rating Depression Scale
(SDS)
Zung W. A self-rating depression scale. Arch Gen Psychiatry 12:63-70.(1965)

Reply to questions using one of the four replies below (A - D)
A - Little or none of the time
B - Some of the time
C - A large part of the time
D - Most or all of the time

A
B
C
D

Little or none of the time
Some of the time
A large part of the time
Most of the time
Score

1. I feel downhearted, blue and sad

1
2
3
4

2. Morning is when I feel the best

4
3
2
1

3. I have crying spells or feel like it

1
2
3
4

4. I have trouble sleeping through the night

1
2
3
4

5. I eat as much as I used to

4
3
2
1

6. I enjoy looking at, talking to, and being with attractive women/men

4
3
2
1

7. I notice that I am losing weight

1
2
3
4

8. I have trouble with constipation

1
2
3
4

9. My heart beats faster than usual

1
2
3
4

10. I get tired for no reason

1
2
3
4

11. My mind is as clear as it used to be

4
3
2
1

12. I find it easy to do the things I used to do

4
3
2
1

13. I am restless and can’t keep still

1
2
3
4

14. I feel hopeful about the future

4
3
2
1

15. I am more irritable than usual

1
2
3
4

16. I find it easy to make decisions

4
3
2
1

17. I feel that I am useful and needed

4
3
2
1

18. My life is pretty full

4
3
2
1

19. I feel that others would be better off if I were dead

1
2
3
4

20. I still enjoy the things that I used to

4
3
2
1

Total raw score

Some questions ask the information positively and others negatively
but in all cases the
symptom severity is scored from 1 to 4.

The total score is often converted to a 100 point scale (SDS Index)
SDS Index = (score / 80 total points) x 100 or SDS Index = score x 1.25

Total SDS raw score

SDS Index (score x 1.25)

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