Table 1 MEDLINE search terms

Search for vitamin D supplementation

1. Vitamin D/explode

2. vitamin D

3. vitamin D2

4. vitamin D3

5. 1-alpha hydroxyvitamin D3

6. 1-alpha-hydroxy-vitamin D3

7. 1-alpha hydroxycalciferol

8. 1-alpha-hydroxy-calciferol

9. 1,25 dihydroxyvitamin D3

10. 1,25-dihydroxy-vitamin D3

11. 1,25 dihydroxycholecalciferol

12. 1,25-dihydroxycholecalciferol

13. 25-hydroxycholecalciferol

14. 25 hydroxycholecalciferol

15. 25 hydroxyvitamin D

16. 25-hydroxy-vitamin D

17. alfacalcidol

18. calcidiol

19. calcitriol

20. calcifediol

21. calciferol

22. ergocalciferol

23. cholecalciferol

24. OR/1-23

Search for depression

25. Depress*

26. Dysthymi*

27. Adjustment Disorder*

28. Mood Disorder*

29. Affective Disorder

30. Affective Symptoms

31. OR/25-30

Search for randomized controlled trials

32. trial

33. clinical trial

34. random* controlled trial

35. RCT

36. group*

37. experiment*

38. intervention

39. placebo

40. OR/32-39

Search for combinations

41. 24 AND 31 AND 40