Table 7. Population attributable fractions for exposure variables amenable to modification.

	AR (%)	% exposed among cases	PAF (%)
Washing only once a day	55.16	36.6	20.18
Not using soap when washing	36.31	45.8	16.61
Staying in a house with mud walls	70.15	91.9	64.45

PAF is the fraction of cases which would not have occurred if an exposure had been avoided and is calculated as % exposed among cases x attributable risk (AR).

AR is the risk of tungiasis in the exposed group due to the exposure and is calculated as (OR– 1)/OR.