Table 3.
Publication bias
| Variable |
Begg’s test |
Egger’s test |
||
|---|---|---|---|---|
| z value | P value a | t value | P value a | |
| 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 |
a, P value < 0.1 was considered as significant publication bias.
Abbreviations: FD functional dyspepsia, PUD peptic ulcer disease, GC gastric cancer.