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Table 4 Sensitivity analysis to include only studies using allele-specific PCR as the genotyping method (2493 cases and 2764 controls)

From: mEH Tyr113His polymorphism and the risk of ovarian cancer development

Genotype comparison OR [95% CI] Z (P value) Heterogeneity of study design Analysis model
χ 2 df (P value) I 2
C-allele vs. T-allele 1.09 [1.00, 1.18] 1.91 (0.06) 2.44 3 (0.49) 0% Fixed
CC vs. TT 1.21 [1.02, 1.43] 2.22 (0.03) 5.40 3 (0.14) 44% Fixed
CC vs. TT + TC 1.23 [1.03, 1.47] 2.30 (0.02) 3.62 3 (0.31) 17% Fixed
TT vs. CC + TC 0.94 [0.84, 1.05] 1.07 (0.29) 0.53 3 (0.91) 0% Fixed