Skip to main content
. 2018 Dec 19;8(12):e021438. doi: 10.1136/bmjopen-2017-021438

Table 2.

Sample sizes considering infinite population, differing estimates for p, age-stratification and loss to follow-up by study site applying Equation-II

Proportion (p) Total minimum number of households without DEFF Total minimum number of households (n 0) with DEFF=1.5 Total minimum number of households (n0) with DEFF=1.5 and q=0.2 n0 adjusted for loss to follow-up
0.1 35 52 259 311
0.2 62 92 461 553
0.3 81 121 605 726
0.4 92 138 691 830
0.5 96 144 720 864
0.6 92 138 691 830
0.7 81 121 605 726
0.8 62 92 461 553
0.9 35 52 259 311

p, proportion of the study population expected to visit a recruitment healthcare facility for conditions associated with fever and other signs and symptoms (proportion captured), set at 0.2; n 0, total minimum number of households to be interviewed in a study area assuming an infinite population;

n0, total minimum number of households to be interviewed in the study area assuming an infinite population and age-stratification;

q, minimum proportion of stratification per age group, set at 0.2; DEFF, design effect, set at 1.5.