RETRACTED ARTICLE: Meta-analysis of the associations between TNF-α or IL-6 gene polymorphisms and susceptibility to lung cancer

Table 5 TNF-α polymorphisms (GG + GA vs. AA) and susceptibility to lung cancer by subgroup analyses of region and detection method

		N	I ²	P value for heterogeneity	OR (95% CI)	Z	P
Region	Europe	5	12.2	0.336	1.40 (0.70 to 2.78)	0.95	0.342
Region	Asia	1			0.12 (0.03 to 0.54)	2.77	0.006
Detection method	Real-time PCR	1			1.27 (0.30 to 5.39)	0.33	0.743
	PCR-RFLP	4	54.5	0.086	0.60 (0.15 to 2.38)	0.73	0.465
	PCR-SSP	1			10.57 (0.58 to 192.90)	1.59	0.112

PCR: polymerase chain reaction; PCR-RFLP: polymerase chain reaction-restriction fragment length polymorphism; PCR-SSP: polymerase chain reaction-sequence specific primer; N: number of enrolled studies; OR: odds ratio; 95% CI: 95% confidence interval.

ISSN: 2047-783X