The intervention increased percentage of households in a village with improved sanitation facilities as defined by the WHO/UNICEF Joint Monitoring Programme by an average of 19 % ( 95 % CI for difference : 12 % -26 % ; group means : 22 % control versus 41 % intervention ) , decreased open defecation among adults by an average of 10 % ( 95 % CI for difference : 4 % -15 % ; group means : 73 % intervention versus 84 % control ) .