Table 3. Publication bias in meta-analysis.

Publicaton bias ( P -value)	Cancer incidence		Cancer mortality
	Begg’s test	Egger’s test	Begg’s test	Egger’s test
Breast cancer	0.640	0.328	1.00	–
Prostate cancer	0.133	0.147	1.00	–
Lung & bronchus cancer	0.767	0.574	1.00	–
Colorectal cancer	0.584	0.357	1.00	–
Total cancer	0.855	0.387	1.00	0.860