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Table 3 Publication bias

From: Association of presence/absence and on/off patterns of Helicobacter pylori oipA gene with peptic ulcer disease and gastric cancer risks: a meta-analysis

Variable Begg’s test Egger’s test
z value P valuea t value P valuea
For oipA on/off status studies
PUD vs. gastritis/FD −0.63 0.531 −0.77 0.465
GC vs. gastritis/FD 0.00 1.000 0.23 0.832
For oipA presence/absence studies
PUD vs. gastritis/FD 1.05 0.293 1.64 0.163
GC vs. gastritis/FD −0.68 0.497 −0.93 0.452
  1. a, P value < 0.1 was considered as significant publication bias.
  2. Abbreviations: FD functional dyspepsia, PUD peptic ulcer disease, GC gastric cancer.