Table 1.
Study setting and year of surveys
| Country | Year of survey | Region |
| Albania | 2017/2018 | Southeastern Europe |
| Benin | 2017/2018 | West Africa |
| Burundi | 2016/2017 | East-central Africa |
| Cameroon | 2018 | West-central Africa |
| Ethiopia | 2016 | East Africa |
| Gambia | 2019/2020 | West Africa |
| Guinea | 2018 | West Africa |
| Haiti | 2016/2017 | Caribbean |
| India | 2019/2021 | South Asia |
| Liberia | 2019/2020 | West Africa |
| Madagascar | 2021 | East Africa |
| Mali | 2018 | West Africa |
| Mauritania | 2019/2021 | Northwest Africa |
| Maldives | 2016/2017 | South Asia |
| Nigeria | 2018 | West Africa |
| Nepal | 2016 | South Asia |
| Rwanda | 2019/2020 | East Africa |
| Sierra Leone | 2019 | West Africa |
| Tajikistan | 2017 | Central Asia |
| Timor-Leste | 2016 | South Asia |
| Uganda | 2016 | East Africa |
| South Africa | 2016 | South Africa |