Notably, the relationship between risk factors and death also appears to change over time, sometimes in quite surprising ways. Study authors were sure to analyze 19 different risk factors, and then adjust that data for differences in age, sex, obesity category, and ethnicity. This approach led to the discovery that less than three percent of people displayed none of the risk factors. “When you look at the mortality risk associated with having lung cancer relative to all the other common cancers, it’s extremely high. Not finishing high school is associated with health risks, besides during the 1980s.