Biosand filters in Ghana contribute to a 60% overall reduction in diarrhoeal disease

11-Feb-2013

An 8-month randomized controlled trial of the plastic biosand filter was performed in 6 rural communities in Tamale, Ghana, during 2008 by Stauber et al (2012). The trial was carried out in order to assess reductions in diarrheal disease and improvements in household drinking water quality. During the study, the longitudinal prevalence ratio for diarrhoea comparing households that received the filter to households that did not receive it was 0.40 (95% confidence interval: 0.05, 0.80), suggesting an overall diarrheal disease reduction of 60%. Further details are available here.