Table 2.

Summary of statistics in multivariable meta-regression.

Variables	category	Coefficient	P -value	95%CI	Q
Study year	$\le$ 2012	Ref.			247.33
	2013–2017	−0.27	0.00614	−1.421–0.863
	$\ge$ 2018	−0.118	0.0261	−1.520–1.281
Region	Oromia	Ref.			42.33
	Amhara	0.30	0.481	−0.593–1.211
	Tigray	0.62	0.211	−0.386–1.636
	AA	0.69	0.52	−0.265–1.647
	SNNPR	0.56	0.32	−0.321–1.321
Sample size	<100	Ref.			270.41
	100–180	0.76	0.00	0.35–0.45
	>180	0.82	0.003	0.27–0.48