Table 3. Pooled Analysis on Association between the C509T polymorphism and the RP risk.

C509T
Genetic Model	Number of study	Sample size		Analysis Model	I2	Test of Association(95%CI)
		case	control			P	OR
Dominant model	7	337	817	F	0	0.16	0.82 [0.62, 1.08]
Recessive model	5	171	600	F	5	0.21	0.74 [0.47, 1.18]
CT vs. CC	5	169	499	F	0	0.36	0.84 [0.58, 1.22]
TT vs. CC	5	113	344	F	0	0.10	0.63 [0.36, 1.08]
Ethnicity
Asian
Dominant model	4	176	465	F	0	0.68	0.92 [0.61, 1.38]
Recessive model	3	113	358	F	48	0.25	0.75 [0.46, 1.23]
CT vs. CC	3	84	251	F	0	0.92	1.00 [0.59, 1.70]
TT vs. CC	3	59	193	F	11	0.55	0.70 [0.39, 1.28]
Caucasian
Dominant model	3	161	352	F	0	0.12	0.73 [0.49, 1.09]
Recessive model	2	58	242	F	0	0.60	0.69 [0.18, 2.71]
CT vs. CC	2	84	251	F	0	0.99	1.00 [0.59, 1.70]
TT vs. CC	2	54	151	F	0	0.19	0.39 [0.10, 1.57]

Dominant model: CT+TT vs. CC; Recessive model: TT vs. CC+CT; Additive model: T vs. C; R, Random-effects model; F, fixed-effects model;