Arsenic exposure assessment was based on information on the individuals' drinking water history and the arsenic concentration of all water sources used during pregnancy.
Individual drinking-water arsenic exposure during pregnancy was calculated using tubewell water arsenic concentration between last menstrual period and date of birth.
Individual drinking-water arsenic exposure during pregnancy was calculated using tubewell water-arsenic concentration between last menstrual period (LMP) and date of birth (DOB) (17).
As a brief test of that explanation, we ran two additional simulations without U1, U2, or U3, but now adding a new lognormal uncertainty factor for individual drinking-water ingestion rates, with 10-fold and 100-fold uncertainty (100 iterations each).
Individual children drinking water status might influence the results that we observed.
Also, this individual recalled drinking water at different places in the hotel, not only in their meeting room, and it is possible that the person had consumed water from the dispenser in the same meeting room as the group with the high attack rate.
Of the 7,683 individuals in the base population, we randomly selected controls from a subset of 4,185 individuals, with drinking water concentrations of arsenic < 500 µg/L; controls were matched to cases by sex and by age within 4 years.
This finding substantiated that the main source of As exposure for these individuals was drinking water.
In each village, all individuals had drinking water from the same source, with small variations in element concentrations over time (Concha et al. 2010).
