Research Article
Brain-Derived Neurotropic Factor Val66Met Polymorphism and Posttraumatic Stress Disorder among Survivors of the 1998 Dongting Lake Flood in China
Table 1
Participants’ characteristics by PTSD status.
| | Variable | Category | Total (%) | PTSD status | value | value | | Yes (%) | No (%) |
| | Overall | | 175 (100.0) | 28 (16.0) | 147 (84.0) | | | | Gender | Female | 94 (53.7) | 20 (71.4) | 74 (50.3) | 4.207 | 0.040 | | Male | 81 (46.3) | 8 (28.6) | 73 (49.7) | | Age (years) | 29–59 | 103 (58.9) | 18 (64.3) | 85 (57.8) | 0.406 | 0.524 | | ≥60 | 72 (41.1) | 10 (35.7) | 62 (42.2) | | Marital status | Married | 152 (86.9) | 25 (89.3) | 127 (86.4) | 0.172 | 0.678 | | Single/divorced/widowed | 23 (13.1) | 3 (10.7) | 20 (13.6) | | Education level | ≤primary school | 103 (58.9) | 13 (46.4) | 90 (61.2) | 2.126 | 0.145 | | >primary school | 72 (41.1) | 15 (53.6) | 57 (38.8) | | Flood-related stressors | 0–2 | 101 (57.7) | 8 (28.6) | 93 (63.3) | 11.600 | 0.001 | | ≥3 | 74 (42.3) | 20 (71.4) | 54 (36.7) | | Postflood stressors | 0–2 | 130 (74.3) | 16 (57.1) | 114 (77.6) | 5.128 | 0.024 | | ≥3 | 45 (25.7) | 12 (42.9) | 33 (22.4) | | BDNF Val66Met carrier status | Val/Val | 40 (22.9) | 2 (7.1) | 38 (25.9) | 4.668 | 0.031 | | Met/Met + Met/Val | 135 (77.1) | 26 (92.9) | 109 (74.1) |
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