Table 2. Stratified analyses of 5-HTTLPR gene polymorphism on LPE risk.

Variables	Na	Cases/Controls	Allelic contrast	Homozygote comparison	Heterozygote comparison	Dominant genetic model
			OR(95%CI) P b/P	OR(95%CI) P b/P	OR(95%CI) P b/P	OR(95%CI) P b/P
Total	6	481/466	0.86(0.79–0.95)0.086/0.002	0.80(0.68–0.95)0.240/0.009	0.85(0.76–0.97)0.047/0.012	0.88(0.81–0.95)0.020/0.002
Ethnicity
Asian	1	119/90	0.64(0.43–0.96)−/0.029	0.54(0.27–1.08)−/0.080	0.61(0.32–1.16)−/0.133	1.47(0.77–2.78)−/0.067
Caucasian	5	362/376	0.88(0.80–0.98)0.086/0.015	0.83(0.70–1.00)0.228/0.046	0.88(0.77–1.00)0.040/0.043	0.90(0.83–0.98)0.024/0.015
Source of control
HB	2	208/182	0.91(0.78–1.06)0.039/0.229	0.87(0.66–1.15)0.077/0.339	0.93(0.75–1.15)0.083/0.518	0.93(0.80–1.07)0.032/0.294
PB	4	273/284	0.83(0.74–0.93)0.213/0.002	0.76(0.61–0.93)0.395/0.008	0.81(0.70–0.94)0.056/0.006	0.85(0.77–0.94)0.042/0.001