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Table 3 Means and standard deviations (SD) derived from the medians of the included studies

From: The prevalence of insufficient iodine intake in pregnancy in Africa: a systematic review and meta-analysis

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