Table 1. Descriptive summary of studies included in systematic review and meta-analysis of CBHI enrolment and its determinants in Ethiopia, 2017–2022.

Author name, year of publication	Region	Study area	Study design	Sampling techniques	Sample size	Response rate	Enrolled in the CBHI scheme	Percent	Risk of bias
Geferso et al., 2022 [34]	Oromia	Akaki	CS	srs	600	97.0	398	66.3	Low
Meseret, et al., 2021 [35]	Oromia	Gida Ayana	CCS	SR	332	100.0	_	_	Low
Glagn et al., 2021 [36]	SNNPR	Segen	CS	SR	820	97.3	273	33.3	Low
Elmi et al, 2021 [37]	Somali	Awbarre	CCS	srs	216	100.0	_	_	Moderate
Tadesse, 2021 [38]	AA	Bole Subcity	CS	SR	435	99.3	312	71.2	Moderate
Getasew et al., 2020 [40]	Amhara	Achefer	CCS	PPS	296	100.0	_	_	Low
Muluken et al., 2020 [41]	Amhara	Tach-Armacho	CCS	SR	262	100.0	_	_	Low
Nageso et al., 2020 [39]	Sidama	Boricha	CS	srs	632	97.8	81	12.8	Moderate
Bifato et al., 2020 [42]	Sidama	Daye	CS	SR	762	98.9	154	20.2	Low
Alebel et al., 2020 [43]	Amhara	South Gondar	CS	srs	1014	98.0	706	68.17	Low
Mekuria et al., 2020 [44]	Oromia	West Shoa	CS	srs	587	96.2	130	22.1	Low
Tsega et al., 2020 [45]	Amhara	West Gojjam	CS	srs	690	97.0	400	58	Low
Belay et al., 2019 [46]	Oromia	Gida Ayana	CS	SR	631	98.0	174	27.5	Low
Workneh et al,2017 [47]	Amhara	Tehuldere	CS	srs	511	96.4	398	77.9	Low
Shibeshi, 2017 [48]	AA	Sebeta	CS	SR	630	99.3	272	43.2	Moderate
					8418	98.3

AA: Addis Ababa, CCS: Case-control study, CS: Cross-sectional study, SRS: systematic random sampling, srs: simple random sampling, SNNPR: Southern Nations, Nationalities, and Peoples’ Region