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| Recurrent MDD | Controls | |
| N | 181 | 186 |
| Age (mean±S.D.) | 33.68±10.07 | 32.94±11.32 |
| Gender (males/females) | 72/109 | 71/115 |
| Age of onset(males/females) | 29.34±9.63 | |
| Average onset times | 3.6 | |
| HAMD score | 29.11±5.89 |
