Table 1 Statistics relating to the prevalence of malaria parasitaemia from the nationally representative household surveys (the demographic health survey (DHS), the malaria indicator survey (MIS) and the HIV/AIDS and malaria indicator survey)
Country | Survey, year, and months | Number of survey clusters (number missing geographic coordinates) | Number of children under five | Simple spatial random sample (mean proportion) | Bias | Simulated proportion. Mean; median; (95% CrI) | Intra-class correlation coefficient (ICC). Mean; median; (95% CrI) | Design Effect. Mean (hdeff); median; (95% CrI) | Effective sample size (ESS). Mean; median; (95% CrI) | Percentage increase or decrease (95% CrI) in ESS compared to actual survey sample |
|---|---|---|---|---|---|---|---|---|---|---|
Kenya | MIS 2007 June to July | 200 (1) | 3423 | 0.07 | − 0.01 | 0.09; 0.09 (0.08 to 0.1) | 0; 0 (0 to 0) | 1.06; 1.06 (1.03 to 1.1) | 6805; 6814 (6575 to 6983) | 99.07 (92.08 to 104) |
Kenya | MIS 2010 July to August | 240 (8) | 5104 | 0.14 | 0.00 | 0.14; 0.14 (0.13 to 0.14) | 0; 0 (0 to 0) | 1.06; 1.06 (1.04 to 1.09) | 6788; 6797 (6584 to 6953) | 33.17 (29 to 36.23) |
Kenya | MIS 2015 July to August | 246 (0) | 4063 | 0.09 | − 0.01 | 0.10; 0.10 (0.09 to 0.11) | 0; 0 (0 to 0) | 1.02; 1.02 (1.01 to 1.04) | 7211; 7218 (7099 to 7288) | 77.65 (74.72 to 79.37) |
Liberia | MIS 2008 to 2009 December to March | 150 (0) | 4611 | 0.36 | 0.00 | 0.36; 0.36 (0.34 to 0.38) | 0.02; 0.02 (0.01 to 0.03) | 1.54; 1.54 (1.38 to 1.73) | 2930; 2930 (2597 to 3254) | − 36.46 (− 43.68 to − 29.43) |
Liberia | MIS 2011 September to December | 150 (0) | 3692 | 0.52 | 0.03 | 0.49; 0.49 (0.47 to 0.51) | 0.03; 0.03 (0.02 to 0.04) | 1.83; 1.82 (1.58 to 2.12) | 2477; 2476 (2123 to 2843) | − 32.94 (− 42.5 to − 23) |
Madagascar | MIS 2011 March to May | 268 (1) | 7138 | 0.06 | 0.00 | 0.06; 0.06 (0.05 to 0.07) | 0; 0 (0 to 0) | 1.03; 1.03 (1.02 to 1.04) | 8349; 8354 (8234 to 8437) | 17.04 (15.35 to 18.2) |
Madagascar | MIS 2013 May to June | 274 (0) | 6288 | 0.07 | − 0.01 | 0.08; 0.08 (0.07 to 0.09) | 0; 0 (0 to 0) | 1.03; 1.03 (1.02 to 1.04) | 8538; 8544 (8414 to 8630) | 35.88 (33.81 to 37.25) |
Malawi | MIS 2012 March to April | 140 (0) | 2436 | 0.39 | 0.01 | 0.39; 0.39 (0.37 to 0.4) | 0.01; 0.01 (0.01 to 0.02) | 1.35; 1.34 (1.23 to 1.49) | 2604; 2609 (2352 to 2857) | 7.1 (− 3.45 to 17.28) |
Malawi | MIS 2014 May to June | 140 (0) | 2249 | 0.32 | 0.03 | 0.29; 0.29 (0.27 to 0.31) | 0.01; 0.01 (0.01 to 0.01) | 1.24; 1.24 (1.15 to 1.35) | 2827; 2831 (2592 to 3042) | 25.88 (15.25 to 35.26) |
Nigeria | MIS 2010 October to December | 239 (0) | 4950 | 0.47 | 0.00 | 0.47; 0.47 (0.46 to 0.49) | 0.03;0.03 (0.02 to 0.03) | 1.64; 1.64 (1.49 to 1.82) | 3793; 3797 (3411 to 4182) | − 23.29 (− 31.09 to − 15.52) |
Nigeria | MIS 2015 October to November | 326 (4) | 7016 | 0.44 | − 0.03 | 0.47; 0.47 (0.46 to 0.49) | 0.03; 0.03 (0.02 to 0.03) | 1.62; 1.61 (1.47 to 1.79) | 5059; 5063 (4541 to 5549) | − 27.84 (− 35.28 to − 20.91) |
Rwanda | DHS 2010 to 2011 September to March | 492 (0) | 8963 | 0.02 | 0.00 | 0.02; 0.02 (0.02 to 0.03) | 0; 0 (0 to 0) | 1.01; 1.01 (1 to 1.01) | 12720; 12730 (12,660 to 12,760) | 42.03 (41.25 to 42.36) |
Rwanda | DHS 2014 to 2015 November to April | 492 (0) | 7931 | 0.08 | − 0.01 | 0.08; 0.08 (0.07 to 0.09) | 0; 0 (0 to 0) | 1.05; 1.05 (1.03 to 1.07) | 12,210; 12,220 (11,950 to 12,410) | 54.08 (50.67 to 56.47) |
Senegal | MIS 2008 to 2009 November to February | 320 (2) | 16,156 | 0.12 | − 0.02 | 0.14; 0.14 (0.13 to 0.15) | 0; 0 (0 to 0.01) | 1.12; 1.12 (1.08 to 1.17) | 8590; 8599 (8231 to 8895) | − 46.78 (− 49.05 to − 44.94) |
Senegal | DHS 2010 to 2011 October to May | 391 (6) | 13,334 | 0.03 | − 0.01 | 0.04; 0.04 (0.04 to 0.05) | 0; 0 (0 to 0) | 1.01; 1.01 (1 to 1.01) | 8161; 8163 (8120 to 8188) | − 38.78 (− 39.1 to − 38.59) |
Senegal | DHS 2012 to 2013 September to June | 200 (0) | 7413 | 0.04 | 0.00 | 0.04; 0.04 (0.04 to 0.05) | 0; 0 (0 to 0) | 1.01; 1.01 (1 to 1.01) | 8169; 8171 (8144 to 8189) | 10.23 (9.86 to 10.47) |
Tanzania | HIV/AIDS and MIS 2011 to 2012 December to May | 583 (10) | 9319 | 0.10 | 0.00 | 0.10; 0.10 (0.09 to 0.11) | 0; 0 (0 to 0) | 1.04; 1.04 (1.03 to 1.05) | 10,130; 10,140 (10,010 to 10,230) | 8.81 (7.41 to 9.78) |
Tanzania | DHS 2015 to 2016 August to February | 608 (0) | 10,901 | 0.12 | 0.01 | 0.11; 0.11 (0.1 to 0.11) | 0; 0 (0 to 0) | 1.03; 1.03 (1.02 to 1.04) | 13,000; 13,000 (12,880 to 13,110) | 19.26 (18.15 to 20.26) |
Uganda | MIS 2009 to 2010 November to February | 170 (0) | 4202 | 0.53 | 0.02 | 0.51; 0.51 (0.5 to 0.53) | 0.02; 0.02 (0.02 to 0.03) | 1.57; 1.57 (1.41 to 1.78) | 3035; 3038 (2680 to 3366) | − 27.7 (− 36.22 to − 19.9) |
Uganda | MIS 2014 to 2015 December to February | 210 (2) | 5210 | 0.33 | − 0.02 | 0.35; 0.35 (0.33 to 0.36) | 0.01; 0.01 (0.01 to 0.02) | 1.33; 1.33 (1.24 to 1.44) | 4425; 4424 (4074 to 4743) | − 15.09 (− 21.8 to − 8.96) |