Table 2. Distribution of gene polymorphism of studies included in a meta-analysis.

Authors, year and reference	Control				Case					TB risk
	Genotype			Minor allele	Genotype			Minor allele	HWE (p-value)
	CC	CT	TT	MAF	CC	CT	TT	MAF
Alavi-Naini et al., 2012 [13]	38	71	22	0.43	18	66	36	0.57	0.25	Significant association
Ayaslioglu et al., 2012 [14]	15	59	42	0.61	16	43	29	0.57	0.41	No association
Zhao et al., 2012 [15]	76	208	120	0.55	75	149	186	0.63	0.39	Significant association
Kang et al., 2009 [16]	72	215	135	0.57	39	118	117	0.64	0.38	Significant association
Rosas-Taraco et al., 2007 [11]	37	63	14	0.39	16	51	37	0.60	0.10	Significant association
Druszczyńska et al., 2006 [17]	48	59	19	0.38	38	59	25	0.44	0.90	No association
Pacheco et al., 2004 [18]	31	54	27	0.48	92	119	56	0.43	0.71	No association