Table 4.

Egger’s regression test for operative time

Variable	Coefficient (Coef.)	Standard Error (Std. Err.)	t value	P value	95% Confidence Interval
Slope	− 19.83	6.90	− 2.88	0.017	− 35.20 to − 4.47
Intercept (bias)	4.43	2.68	1.65	0.129	− 1.54 to 10.39