Table 1. Summary of the included studies which were done on the proportion of adequately iodized salt at HH level in Ethiopia, 2013–2020 (n = 28).

S.No.	Authors	Year of Publication	Region	Study Area	Study Setting	Sample size	Response Rate (%)	NOQS	Proportion HHs using AIS (%)
1	Mesele et al. [16]	2014	Amhara	Lay Armachiho	Both	694	99.4	10	29.7
2	Mekonnen et al. [19]	2018	Amhara	Dessie & Combolcha	Urban	500	95.4	10	68.8
3	Ajema et al. [31]	2020	SNNPR	Arba Minch	Urban	875	100.0	10	58.20
4	Abebe et al. [17]	2017	Amhara	Dabat	Both	705	98.7	10	33.20
5	Anteneh et al. [18]	2017	Amhara	Dera	Both	1194	96.2	10	57.2
6	Desta et al. [35]	2019	Tigray	Ahferom	Both	292	91.8	8	17.5
7	Gebriel et al. [40]	2014	Benishangul Gumuz	Assosa	Urban	395	100.0	10	26.1
8	Wondimagegn et al. [33]	2018	SNNPR	Wolaita Sodo	Both	440	99.8	10	36.7
9	Tariku et al. [20]	2019	Amhara	Mecha	Both	700	98.0	10	63.3
10	Gebremariam et al. [15]	2013	Amhara	Gondar	Urban	810	95.5	10	28.9
11	Hailu et al. [25]	2016	Oromia	Robe	Both	393	93.1	10	29.0
12	Gidey et al. [36]	2015	Tigray	Laelay Maychew	Rural	600	98.4	9	33.0
13	Yaye et al. [38]	2016	Dire Dawa	Dire Dawa	Urban	694	100	10	7.5
14	Hawas et al. [23]	2016	Oromia	Assela	Urban	513	96.4	10	62.9
15	Ayigegn et al. [7]	2020	Addis Ababa	Kolfie Keranio	Urban	541	95.5	10	95.5
16	Yazew [28]	2020	Oromia	Horro	Both	390	100	8	23.6
17	Meselech et al. [24]	2016	Oromia	Lalo Assabi	Both	768	95.0	10	8.7
18	Hiso et al. [29]	2019	Oromia	Duguda	Rural	402	100	10	30.7
19	Woyraw et al. [22]	2018	Amhara	Jabitehinan	Both	549	98.0	9	48.3
20	Aredo et al. [27]	2020	Oromia	Hetosa	Both	596	98.8	8	61.1
21	Tigabu et al. [21]	2017	Amhara	Gasgibla	Both	443	97.6	10	17.2
22	Asfaw et al. [32]	2020	SNNPR	Dewaro Zone	Both	230	NR	7	19.1
23	Fereja et al. [26]	2018	Oromia	Ada	Both	351	98.3	10	39.3
24	Afework et al. [6]	2019	Amhara	Dega Damot	Both	802	100.0	10	4.6
25	Ftwi et al. [37]	2018	Dire Dawa	Dire Dawa	Urban	402	99.5	10	49.0
26	Belay	2020	Addis Ababa	Kolfie Keranio	Urban	417	98.5	10	63.8
27	Stoecker et al. [34]	2020	SNNPR	Sidama Zone	Both	269	NR	7	21.0
28	Tololu et al.	2016	Oromia	Goba Town	Urban	596	99.7	9	30.0

NOQS: Newcastle Ottawa Quality Score; HH: Household; AIS: Adequately Iodized Salt.