Table 4. Characteristics and results of the present study compared with the previous meta-analysis.

Polymorphism	Contrast	No. of studies		No. of cases		No. of controls		Overall results
		previous	present	previous	present	previous	present	previous	present
+936C/T	TT vs. CC	3	6	407	1,445	621	2,337	–	+
(rs3025039)	TT vs. CT+CC							–	+
	TT+CT vs. CC							–	+
	CT vs. CC							–	–
	T vs. C							–	+
−2578C/A	AA vs. CC	2	5	359	1,397	378	2,094	+	+
(rs699947)	AA vs. CA+CC							–	+
	AA+CA vs. CC							–	+
	CA vs. CC							–	+
	A vs. C							+	+
+1612G/A	AA vs. GG	NA	3	NA	918	NA	1,330	NA	–
(rs10434)	AA vs. GA+GG							NA	–
	AA+GA vs. GG							NA	–
	GA vs. GG							NA	–
	A vs. G							NA	–
−460T/C	CC vs. TT	2	3	265	677	475	1,299	–	–
(rs833061)	CC vs. TC+TT							–	–
	CC+TC vs. TT							–	–
	TC vs. TT							–	–
	C vs. T							–	–
−634G/C	CC vs. GG	NA	3	NA	1,038	NA	1,716	NA	–
(rs2010963)	CC vs. GC+GG							NA	–
	CC+GC vs. GG							NA	–
	GC vs. GG							NA	–
	C vs. G							NA	–
−405G/C	CC vs. GG	2	2	262	262	477	477	–	–
(rs2010963)	CC vs. GC+GG							–	–
	CC+GC vs. GG							–	–
	GC vs. GG							–	–
	C vs. G							–	–
−1154G/A	AA vs. GG	2	2	373	373	516	516	–	–
(rs1570360)	AA vs. GA+GG							–	–
	AA+GA vs. GG							–	–
	GA vs. GG							–	–
	A vs. G							–	–