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| Recurrent MDD | Controls | |
|---|---|---|
| N | 256 | 272 |
| Age (mean ± S.D.) | 34.40 ± 11.01 | 35.40 ± 12.81 |
| Gender (males/females) | 98/158 | 102/170 |
| Age of onset (males/females) | 28.18 ± 9.01 | |
| Average onset times | 3.75 | |
| HAMD score | 28.89 ± 5.66 |
