Table 2. Result of the multivariable meta-regression model for the most important characteristics with backward regression analysis (Inverse Variance Weights).

Variable	Coeff.	Std. Err.	p - value	RDOR	[95%CI]
Cte.	1.838	0.9233	0.0516	-	-
S	−0.629	0.1301	0.0000	-	-
Instrument type	0.440	0.2573	0.0930	1.55	(0.93; 2.60)
Sample size	2.577	0.5975	0.0001	13.15	(3.97; 43.57)