Note that if you divide the total cases by the number of study participants, you get a total cancer incidence rate of 0.0326. If we assume roughly equal numbers

Note that if you divide the total cases by the number of study participants, you get a total cancer incidence rate of 0.0326. If we assume roughly equal numbers of participants using versus not using artificial sweeteners and solve for AVG(x, 1.15x) = 0.0326, we get 0.0303 for non-users and 0.0348 for users. So your risk goes from about 3% to 3.5%. Not nothing, but I'm not sure that really ticks off a worry box for me. Though I don't personally eat much sweetened food at all, artificial or otherwise (work from home and enjoy cooking, so I make most everything from raw ingredients).