Brain-Derived Neurotropic Factor Val66Met Polymorphism and Posttraumatic Stress Disorder among Survivors of the 1998 Dongting Lake Flood in China

Table 3

Logistic regression analyses of the effects of participants’ characteristics and BDNF Val66Met polymorphism on PTSD status.

Variable	Category	Univariable analyses		Multivariable analyses
		OR (95% CI)	value	aOR (95% CI)	value
Gender	Male	1		1
	Female	2.47 (1.02–5.95)	0.045	2.90 (1.04–8.08)	0.042
Age (years)	29–59	1		1
	≥60	0.76 (0.33–1.76)	0.525	1.32 (0.44–3.94)	0.615
Marital status	Married	1		1
	Single/divorced/widowed	0.762 (0.21–2.76)	0.679	0.44 (0.10–1.88)	0.264
Education level	>primary school	1		1
	≤primary school	0.549 (0.24–1.24)	0.148	0.51 (0.19–1.36)	0.177
Flood-related stressors	0–2	1		1
	≥3	4.31 (1.78–10.44)	0.001	5.83 (2.18–15.59)	<0.001
Postflood stressors	0–2	1		1
	≥3	2.59 (1.12–6.02)	0.027	2.85 (1.02–7.94)	0.045
BDNF Val66Met carrier status	Val/Val	1		1
	Met/Met + Met/Val	4.53 (1.03–20.01)	0.046	4.76 (1.02–22.15)	0.047

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