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. 2022 Oct 27;11:231. doi: 10.1186/s13643-022-02072-6

Table 3.

Means and standard deviations (SD) derived from the medians of the included studies

First author, year Country, period of data collection Sample size median Derived mean Derived SD
Chaouki, 1994 [23] Algeria (1994) 982 17.9 17.9 0.1
Ngo, 1997 [24] DRC (1991–1992) 306 39.3 43.7 21.5
Hess, 1999 [25] Cote de'Ivore 72 351 351 455
Hess, 1999 [25] Cote de'Ivore 66 136 184.2 192.3
Ojule 1998 [26] Nigeria, 1998 90 213 213 9.9
Ojule 1998 [26] Nigeria, 1998 105 149 149 14.7
Dillon, 2000 [27] Senegal 1996–1997 462 60 60 39
Eltom, 2000 [28] Sudan 1998–1999 47 38 33.6 29.1
Lwenje, 2000 [29] Swaziland 165 295 299 30
Akdader-O, 2020 [30] Algeria 2016–2017 173 233 234.8 37
Garnier, 2016 [31] Burkina Faso 946 74 74 28.2
Kavishe, 2020 [32] Burundi 2018 87 86.7 87 33.2
Habimana, 2013 [33] DRC, 2009–2011 225 138 138.4 50
IGN, 2017 [14, 34] Djibouti, 2015 (NS) 230 265 294 205
MOHP, 2017 [35] Egypt, 2014–2015 1498 135 135 50.5
Hamza, 2007 [36] Egypt, 2006 113 102 102.9 31.1
Elsayed, 2016 [37] Egypt,2016 400 170 173.5 56.5
Mohammed, 2020 [38] Ethiopia, 2013–2014 562 120.6 136.1 109.6
Fereja, 2018 [39] Ethiopia 354 85.7 89.3 67.2
Kedir, 2014 [40] Ethiopia, 2012 435 58.1 63.8 66.7
Ersino, 2013 [41] Ethiopia, 2009 172 15 16.9 22.8
Takele, 2017 [42] Ethiopia, 2017 403 137 137 59.5
Keno, 2017 [43] Ethiopia, 2014 40 88.6 96.8 51.2
Negeri, 2014 [44] Ethiopia, 2011 423 48 48 17.9
NaNA, 2019 [45] Gambia 2018 118 113.5 123.7 116.7
GHS, 2017 [46] Ghana, 2015 102 183.5 183.5 69.5
Gyamfi, 2018 [47] Ghana, 2016 (ss) 239 159 159 59.7
Adu-Afarwuah, 2018 [48] Ghana, 2009–2011 295 137 145.8 106.5
Farebrother, 2018 [49] Kenya 162 337 347.2 229.6
Randremanana, 2019 [50] Madagascar, 2014 170 53 50.2 59.8
Stinca, 2017 [51, 52] Morocco 2013–14 245 32 35.9 30.6
Sadou 2013 [53] Niger 2012 240 119 119 44.8
Hess, 2017 [54] Niger, 2014–2015 662 69 73.9 56.4
Jibril, 2016 [55] Nigeria, 2014 300 193 193 71.5
Kayode, 2019 [56] Nigeria, 2012 133 135 138.5 58.5
Ujowundu, 2010 [57] Nigeria, 2009 302 151.1 152.1 41.7
Rohner, 2016 [58] Sierra Leone, 2013 154 175.8 176 65.9
MOH-FGS, 2020 [34] Somalia, 2018–19 236 269 424 454
Mabasa, 2019 [59] South Africa, 2012–13 565 164 183.3 147.9
Stinca, 2017 [51, 52] South Africa 207 174 189.8 151
Mtumwa, 2017 [60] Tanzania, 2009–2010 947 136.8 151.9 147.9
Ba, 2020 [61] Tanzania, 2015–2016 266 156.1 160.6 146
Stinca, 2017 [51, 52] Tanzania, 2016 330 422 434.3 252.4
Chinyanga, 2006 [62] Zimbabwe, 2006 94 115.5 128.5 137