Table 1. Sample size calculation table Indicator Conventional treatment group Intervention treatment group Power of the study 95% CI SD* Number in each group Total number adjusted for 10% drop out Cure rate 40% 65% 90% 95% - 78 170 HAZ < -2 38% 19% 90% 95% - 84 184 Incidence of E. histolytica infection per 100 child-year 20a 15 90% 95% 10 85 188 Average diarrheal episode per child 2a 1 90% 95% 1.5 48 106 Mean haemoglobin mg% 10a 12 90% 95% 4 85 188 Respiratory tract infection episode/child 6a 4 90% 95% 3 48 106 * SD = Within group standard deviation