Table 1.

Summary characteristics of cross sectional studies included in the systematic review

	Author/year	Country	aIncome	Type of participant	bTotal population	cGirls married	Marriage Age range	Prevalence of child marriage (%)
1	Rahman 2005 [38]	Bangladesh	Lower-middle	Adolescents aged 10–19 years	3362	2256	16.2 ± 1.9	67.1
2	Raj/ 2009 [72]	India	Lower-middle	Married—aged 20–24 years	22 807	7730	< 18	44.5
3	Nasrin/ 2012 [39]	Bangladesh	Lower-middle	Married women	609	510	< 18	83.7
4	Adams/ 2013 [40]	Nigeria	Lower-middle	Adolescents 10–19 years and parents	397	17	16.1 ± 2.3	11
5	A Ali 2014 [41]	Sudan	Low	Ever married women aged ≤ 35 year	1700	781	15.4	45.9
6	Al Ridhwany 2014 [42]	Iraq	Upper-Middle	Married women in child-bearing age having at least two living children	1302	204	18.5 ± 4.2	15.7
7	Asrese 2014 [43]	Ethiopia	Low-Income	Currently married or ever married	476	395	< 18	83
8	Dharan. 2014 [44]	Nepal	Lower-Middle	Women aged 15 to 45 years	300	208	< 18	69.3
9	Sumon 2014 [45]	Bangladesh	Lower-Middle	Married aged less than 50 year	600	538	15–19	89.7
10	Ghrayeb/ 2015 [46]	Palestinian	-	Rural married women	500	207	< 18	41.4
11	Envuladu 2016 [47]	Nigeria	Lower-Middle	Secondary School Girls Within The Ages Of 10-25 years	4013	74	< 18	1.8
12	Islam 2016 [48]	Bangladesh	Lower-Middle	Ever-married women aged 12–49 years	17,808	13,837	< 18	77.7
13	Hamed/ 2017 [49]	Egypt	Lower-Middle	Ever-married women aged 20–60 years	1064	640	17.86 ± 3.27	60.15
14	Mpilambo, 2017 [66]	Congo	Low	Young women aged 15–24 years	3481	2238	16.7	64.29
15	Rahman 2017 [50]	Bangladesh	Lower-Middle	Married women aged 15 to 49 years	16,830	12,740	< 18	75.04
16	Groot 2018 [67]	Ghana	Lower-Middle	Ever-married women aged 20–29 years	1943	509	< 18	26.19
17	Pham 2018 [51]	Viet Nam	Lower-Middle	Girls from young	424	55	< 18	12.8
18	Basazinewu/2018 [55]	Ethiopia	Low	women's of 15–50 years	350	318	< 17	90.85
19	Rumble 2018 [70]	Indonesia	Lower-Middle	women aged 20 to 24	6578	938	15.82 ± 0.05	14.27
20	Ahonsi 2019 [52]	Ghana	Lower-Middle	women aged 20–24(GDHS)	1613	334	17.7	20.68
21	Bezie/ 2019 [53]	Ethiopia	Low	married women aged 15–49 years	373	167	17 ± 3.2	44.80
22	Gashaw 2019 [54]	Ethiopia	Low	married women age 15–49 year	9262	5942	< 18	64.2
23	Kalum 2019 [56]	Congo	Low	women of childbearing age	5304	1227	12–18	23.1
24	Alem/ 2020 [68]	Ethiopia	Low	all women aged from 15– 49 years	11,646	7322	< 18	62.87
25	Chowdhury 2020 [69]	Bangladesh	Lower-Middle	-	8,699	7,046	< 18	80.99
26	Manandhar/ 2020 [60]	Nepal	Lower-Middle	Married women age less than 50 years	358	187	17.2	52.2
27	Talukder 2020 [61]	Bangladesh	Lower-Middle	married women aged 15–49	17,883	10,551		59
28	Tekile/2020 [62]	Ethiopia	Low	all female community members	1120	544	15	48.57
29	Berliana 2021 [57]	Indonesia	Lower-Middle	reproductive women aged 15– 49 years	7207	1009	15–19	14
30	Hasanah 2021 [58]	Indonesia	Lower-Middle	married women	1687	909	< 18	53.9
31	Roy 2021 [59]	Bengal	Lower-Middle	married women 15–49 years	357	230	< 18	64.42
32	Aychiluhm/2021 [63]	Ethiopia	Low	All women aging 15–49 years	2887	2098	< 18	73
33	Bengesai/2021 [64]	Zimbabwe	Lower-Middle	Ever-married women aged between 20–29 years	2380	821	24.2 ± 2.7	36.8
34	Masresha 2021 [65]	Ethiopia	Low	adolescent women between the ages of 15 to 19	597	232	17.62 ± 1.36	38.9

^aThis information was followed linked; https://datatopics.worldbank.org/world-development-indicators/the-world-by-income-and-region.html

^bTotal papulation that was examined in these studies

^cTotal girls that got married under 18 year