Table 2. Meta-analysis results.

Variables	N	Dominant genetic model (LL+LS vs. SS)				Recessive genetic model (LL vs. LS+SS)				Homozygous model (LL vs. SS)				Heterozygous model (LS vs. SS)				Allelic contrast model (L-allele vs. S-allele)
		I2 (%)	OR (95% CI)	P		I2 (%)	OR (95% CI)	P		I2 (%)	OR (95% CI)	P		I2 (%)	OR (95% CI)	P		I2 (%)	OR (95% CI)	P
Overall	8	67.6	0.732 (0.483–1.110)	0.142		75.5	0.827 (0.511–1.339)	0.440		75.9	0.707 (0.391–1.278)	0.251		44.3	0.787 (0.617–1.002)	0.052		65.4	0.830 (0.647–1.066)	0.144
Ethnicities
Asian	3	72.3	0.977 (0.550–1.733)	0.935		88.3	1.085 (0.397–2.970)	0.873		86.9	1.042 (0.356–3.055)	0.94		7.0	0.920 (0.665–1.273)	0.615		43.5	0.656 (0.539–0.799)	<0.001
Caucasia	4	60.9	0.638 (0.362–1.124)	0.12		0	0.754 (0.536–1.059)	0.103		31.1	0.635 (0.417–0.958)	0.035		61.7	0.669 (0.360–1.243)	0.203		49.3	0.882 (0.715–1.088)	0.240
Africa	1	0.0	0.240 (0.050–1.140)	0.073		0	0.364 (0.128–1.036)	0.058		0.0	0.168 (0.032–0.884)	0.035		0.0	0.329 (0.063–1.731)	0.189		0.0	0.388 (0.180–0.834)	0.015
Source of control
HB	3	62.7	0.681 (0.313–1.482)	0.333		34.4	0.734 (0.485–1.109)	0.142		63.4	0.594 (0.237–1.488)	0.266		43.9	0.784 (0.496–1.238)	0.296		76.6	1.071 (0.592–1.939)	0.820
PB	5	74.7	0.748 (0.432–1.296)	0.301		82.6	0.924 (0.463–1.846)	0.823		81.9	0.776 (0.345–1.750)	0.542		55.6	0.738 (0.471–1.155)	0.183		56.2	0.746 (0.576–0.967)	0.027
SPE vs. Con	2	0.0	0.852 (0.484–1.500)	0.578		0.0	0.793 (0.447–1.405)	0.426		0.0	0.772 (0.388–1.538)	0.462		0.0	0.924 (0.493–1.732)	0.805		0.0	0.853 (0.594–1.224)	0.384

N, number; OR, odds ratio; CI, confidence interval; PH, pheterogeneity; HB, hospital based; PB, population based.