Table 4.

Egger’s regression intercept and the Begg and Mazumdar rank correction

Kendall’s S statistic (P-Q)	6.000
Kendall’s tau with continuity correction
Tau	0.179
z-value for tau	0.619
P-value (1-tailed)	0.269
P-value (2-tailed)	0.536
Kendall’s tau without continuity correction
Tau	0.214
z-value for tau	0.742
P-value (1-tailed)	0.229
P-value (2-tailed)	0.458
Egger’s regression intercept
Intercept	4.495
Standard error	6.132
95% low limit (2-tailed)	-10.511
95% upper limit (2-tailed)	19.499
t-value	0.448
Df	6.000
P-value (1-tailed)	0.246
P-value (2-tailed)	0.491