We calculated the burden attributable to risk factors with continuous exposure by comparing the present distribution of exposure to the theoretical-minimum-risk exposure distribution for each age group, sex, year (1990 and 2010), and cause according to the following formula: PAF=∫x=0mRR(x)P1(x)dx−∫x=0mRR(x)P2(x)dx∫x=0mRR(x)P1(x)dx