Table 3.
Summary of study sampling protocols
| Study | Date | Geographic scope | Sampling methodology | Survey modality | Weights |
|---|---|---|---|---|---|
| Burkina Faso | 15 October to 4 December 2020 | National | RDD | Phone | Yes |
| Colombia | 15–25 August 2020 | National | RDD | Phone | Yes |
| India | 17 June 2020 to 18 January 2021 | Subnational, slums in two cities | Representative sample of slum dwellers living in the vicinity of a community toilet and located in Uttar Pradesh | Phone | Yes |
| Mozambique | 30 October to 30 November 2020 | Subnational, two cities | (1) Random sample in urban and peri-urban markets stratified by gender and type of establishment in Maputo; (2) random sample representative of communities in the Cabo Delgado, stratified on urban, semi-urban and rural areas | Phone | No |
| Nepal | 1–11 December 2020 | Subnational, two districts | Random sample of poor households from randomly selected villages in Kanchanpur | Phone | Yes |
| Nigeria | 18 November to 18 December 2020 | Subnational, one state | (1) Random sample of individuals in Kaduna; (2) sample of phone numbers from a phone list of Kaduna state residents | Phone | No |
| Pakistan 1 | 24 July to 9 September 2020 | Subnational, two districts | Random sample of individuals in administrative police units in two districts of Punjab | Phone | Yes |
| Pakistan 2 | 2 September to 13 October 2020 | Subnational, one province | RDD on a random sample of all numerically possible mobile phone numbers in the region of Punjab | Phone | No |
| Russia | 6 November to 1 December 2020 | Subnational, 61 regions | Sample recruited from the Russian online survey company OMI (Online Market Intelligence); sampling was targeted at having a minimum of 150 respondents per region, as well as representation of age, gender and education group | Online | Yes |
| Rwanda | 22 October to 15 November 2020 | National | RDD | Phone | Yes |
| Sierra Leone 1 | 2–19 October 2020 | National | RDD | Phone | Yes |
| Sierra Leone 2 | 7 October 2020 to 20 January 2021 | National | Random sample of households in 195 rural towns across all 14 districts of Sierra Leone | Phone | No |
| Uganda 1 | 21 September to 6 December 2020 | Subnational, 13 districts | Sample of women in households from semi-rural and rural villages across 13 districts in Uganda, selected according to the likelihood of having children | Phone | No |
| Uganda 2 | 23 November to 12 December 2020 | Subnational, one district | Random sample of households in Kampala | Phone | No |
| United States | 4–5 December 2020 | National | Nationwide sample of adult internet users recruited through the market research firm Lucid | Online | Yes |
RDD, random digit dialing.