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| Duration (Months) | Male (%) | Female (%) | Total (%) |
| < 3 | 81 (22.6) | 137 (35.9) | 218 (29.4) |
| 3 – 6 | 53 (14.8) | 39 (10.2) | 92 (12.4) |
| 6 – 9 | 44 (2.3) | 38 (9.9) | 82 (11.1) |
| 9 – 12 | 16 (4.5) | 32 (8.4) | 48 (6.5) |
| 12 < | 165 (46) | 136 (35.6) | 301 (40.6) |
| Total | 359 (100.0) | 382 (100.0) | 741 (100.0) |
