Various population studies, primarily focused on SCD due to ischemic heart disease, have demonstrated age gradients in SCD risk among men and women.S10.6-8 S10.6-10 These include a 10-year lag in SCD incidence in women compared with men. How- ever, risk factor burden among women has the same proportional effect as in men, with a 17-fold increase in risk from the lowest to highest deciles.S10.6-9 Impor- tantly, 69% of the SCDs in women were first cardiac A study of lifetime risk of SCD stratified at 45, 55, 65, and 75 years of age identified persistently lower and similar proportions of lifetime risk of SCD among women versus men in each of the strata.S10.6-10 The difference between women and men is somewhat smaller at ages below and above 75 years, largely be- cause of a reduced risk in men. 