XPD Lys751Gln polymorphism and esophageal cancer risk: A meta-analysis involving 2288 cases and 4096 controls

Table 2 Summary odds ratios and 95% confidence interval of xeroderma pigmentosum group D Lys751Gln polymorphism and esophageal cancer risk

	CC vs AA		CA vs AA		CA/CC vs AA		CC vs CA/AA
	OR (95% CI)	P1	OR (95% CI)	P1	OR (95% CI)	P1	OR (95% CI)	P1
Total	1.19 (0.84-1.69)	0.01	1.03 (0.83-1.27)	0.01	1.05 (0.85-1.32)	0.01	1.16 (0.97-1.39)	0.062
Ethnicity
European	1.26 (0.95-1.65)	0.052	1.00 (0.64-1.54)	0.01	1.01 (0.65-1.56)	0.01	1.20 (0.94-1.55)	0.282
Asian	1.44 (0.37-5.66)	0.02	0.91 (0.71-1.15)	0.122	0.96 (0.63-1.45)	0.03	1.47 (0.38-5.71)	0.02
Histological type
EADC	1.25 (1.01-1.55)	0.052	1.13 (0.85-1.52)	0.02	0.98 (0.68-1.41)	0.01	1.18 (0.97-1.44)	0.212
ESCC	1.24 (0.56-2.70)	0.04	1.02 (0.73-1.41)	0.04	1.05 (0.74-1.50)	0.01	1.06 (0.71-1.58)	0.062

¹P value for heterogeneity;

²Estimates for fixed-effects model. OR: Odds ratio; CI: Confidence interval.