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Table 1 Search strategy for MEDLINE and adaptability to regional databases

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

Search Search items Hits
1 iodine deficiency [tw] OR iodine insufficiency [tw] OR insufficient iodine intake [tw] OR insufficiency iodine nutrition [tw] OR iodine  
2 urine iodine excretion [tw] OR urine iodine concentration [tw] OR urinary iodine excretion [tw] OR urinary iodine concentration [tw] OR urine iodine  
3 Pregnancy [tw] OR Pregnant women [tw] OR expectant mothers [tw] first trimester [tw] [tw] OR second trimester [tw] third trimester [tw]  
4 #1 AND #3  
5 #2 AND #3  
6 African filter((((Angola[tw] OR Benin[tw] OR Botswana[tw] OR “Burkina Faso”[tw] OR Burundi[tw] OR
Cameroon[tw] OR “Cape Verde”[tw] OR “Central African Republic”[tw] OR Chad[tw] OR Comoros[tw] OR
Congo[tw] OR “Democratic Republic of Congo”[tw] OR Djibouti[tw] OR “Equatorial Guinea”[tw] OR Eritrea[tw]
OR Ethiopia[tw] OR Gabon[tw] OR Gambia[tw] OR Ghana[tw] OR Guinea[tw] OR “Guinea Bissau”[tw] OR
“Ivory Coast”[tw] OR “Cote d’Ivoire”[tw] OR Kenya[tw] OR Lesotho[tw] OR Liberia[tw] OR Madagascar[tw] OR
Malawi[tw] OR Mali[tw] OR Mauritania[tw] OR Mauritius[tw] OR Mozambique[tw] OR Namibia[tw] OR Niger
[tw] OR Nigeria[tw] OR Principe[tw] OR Reunion[tw] OR Rwanda[tw] OR “Sao Tome”[tw] OR Senegal[tw] OR
Seychelles[tw] OR “Sierra Leone”[tw] OR Somalia[tw] OR “South Africa”[tw] OR Sudan[tw] OR Swaziland[tw]
OR Tanzania[tw] OR Togo[tw] OR Uganda[tw] OR “Western Sahara”[tw] OR Zambia[tw] OR Zimbabwe[tw]
OR “Central Africa”[tw] OR “Central African”[tw] OR “West Africa”[tw] OR “West African”[tw] OR “Western
Africa”[tw] OR “Western African”[tw] OR “East Africa”[tw] OR “East African”[tw] OR “Eastern Africa”[tw] OR
“Eastern African”[tw] OR “South African”[tw] OR “Southern Africa”[tw] OR “Southern African”[tw] OR “sub
Saharan Africa”[tw] OR “sub Saharan African”[tw] OR “subSaharan Africa”[tw] OR “subSaharan African”[tw]
NOT “guinea pig” [tw] NOT “guinea pigs” [tw] NOT “aspergillus niger” [tw]))))
 
7 # 4 AND # 6 Limits: 01/01/1990 to 31/12/2018 in English, French, and Portuguese on humans  
8 # 5 AND # 6 Limits: 0109/1990 to 31/12/2018 in English, French, and Portuguese on humans