Table 3. Study characteristics.

Author [ref.]	Year of Publication	Country of Origin	Sample Size
Ofoha CG et al. [10]	2021	Nigeria	59
Salako AA et al. [14]	2016	Nigeria	268
Olapade EO et al. [16]	2001	Nigeria	52
Ahmed Gadam I et al. [12]	2012	Nigeria	253
Kiptoon DK et al. [17]	2004	Kenya	85
Odusanya BO [18]	2015	Nigeria	90
Abdullahi M, Aji SA [19]	2016	Nigeria	72
Kpatcha TM et al. [20]	2016	Togo	54
Oliech JS [21]	2007	Kenya	550
Ugwumba FO et al. [13]	2014	Nigeria	297
Deneke A et al. [22]	2020	Ethiopia	89
Elshal AM et al. [23]	2016	Egypt	183
Alemu MH [24]	2009	Ethiopia	71
Alhasan SU et al. [25]	2009	Nigeria	502
Ogbonna BC et al. [26]	1997	Nigeria	31
Hill AG and Njoroge P [27]	2002	Kenya	106
Steele GS, Sleep DJ [28]	1997	South Africa	47
Kyei MY et al. [29]	2012	Ghana	58
Sikangula I et al.	2007	Congo	32
Undie CU et al. [30]	2021	Nigeria	40
Fayad AS et al. [31]	2011	Egypt	60