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Table 3 Results of publication bias test

From: Association between cyclooxygenase-2 (COX-2) 8473 T > C polymorphism and cancer risk: a meta-analysis and trial sequential analysis

Compared genotype

Begg’s test

Egger’s test

z value

P value

t value

P value

CC vs. TT

1.10

0.273

0.34

0.734

TC vs. TT

−0.16

0.876

−0.14

0.890

(CC + TC) vs. TT

0.64

0.523

0.06

0.951

CC vs. (TC + TT)

0.93

0.354

0.24

0.807

C allele vs. T allele

0.79

0.429

0.14

0.891

  1. P value < 0.05 was considered as significant publication bias