Table 4.
Research:need ratios for all sample years
| Mental health problem | Number of trials | Number of participants | WHO YLD 2002 | Ratio |
| Unipolar depressive disorders | 36 | 2913 | 56484904 | 5.16 |
| Schizophrenia | 33 | 5270 | 14353406 | 36.72 |
| Alcohol use disorders | 7 | 434 | 13646427 | 3.18 |
| Bipolar disorder | 9 | 805 | 12472021 | 6.45 |
| Panic disorder | 6 | 272 | 5996378 | 4.54 |
| Dementias | 19 | 1418 | 5421155 | 26.20 |
| Obsessive-compulsive disorder | 3 | 202 | 4364394 | 4.63 |
| Drug use disorders | 13 | 5749 | 4064053 | 141.40 |
| Post traumatic stress disorder | 0 | 0 | 2842102 | ----- |
Mental Health Problems were sorted by WHO YLD 2002
Ratio = Number randomised/YLD need (×10*6)