Table 2.

Pooled result of the meta-analysis by region.

Subgroup	Studies	Participants	Events	Percent	Statistical method	Effect estimate
Amhara	5	2,796	1,149	41.10	Odds ratio (IV, Random, 95% CI)	0.72 [0.33, 1.58]
Tigray	3	1,620	809	49.94	Odds ratio (IV, Random, 95% CI)	1.40 [0.43, 4.58]
Addis Ababa	6	2,403	980	40.78	Odds ratio (IV, Random, 95% CI)	0.72 [0.30, 1.73]
SNNPR	2	1,020	286	28.04	Odds ratio (IV, Random, 95% CI)	0.43 [0.01, 18.06]
Oromia	1	275	76	27.64	Odds ratio (IV, Random, 95% CI)	0.38 [0.29, 0.50]
Harar	1	272	243	89.34	Odds ratio (IV, Random, 95% CI)	8.38 [5.71, 12.31]
Pooled result	18	8,386	3,543	42.25	Odds ratio (IV, Random, 95% CI)	0.84 [0.52, 1.36]