Cohort profilesCASCAP is an ongoing project in which the number of participants changes dynamically. For the purpose of this preliminary report, the data at the completion of the first year of the project were analyzed and the characteristic of participants at baseline were reported.A total of 85,927 individuals were enrolled with a mean age of 53.8 ± 9.8 years of whom 55.6 % were female (Table 2). About three quarters, 77.5 %, had attained primary school as the highest level of education, and 79.9 % were farmers. More than half, 55.9 % had previously been tested for liver fluke infection. Among the 47,258 participants who had been tested, 42.2 % were found to be infected. About a quarter, 29.9 %, reported they have relatives with CCA and 89.1 % had previously eaten uncooked or fermented fish (specifically, freshwater fish with scales).