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. The overall lifetime risk of SCD was 1 in 9 among men and 1 in 30 among In studies of outcomes after out-of-hospital car- diac arrest, women were older, had more SCAs in homes, and fewer shockable rhythms (VT/VF) than This was associated with a somewhat lower probability of survival overall; however, women with VT/VF and those with pulseless electrical activity had better outcomes than men.S10.6-12 A retrospective analy- sis of out-of-hospital cardiac arrest reported that survival improved over a 10-year period, with more favorable outcomes in men as well as younger women.S10.6-13 Two studies demonstrated better outcomes in wom- en with VT/VF, despite adverse risk factor profiles in Another large study demonstrated that despite similar prehospital return of spontaneous cir- culation and survival to discharge, younger women had lower 1-month neurologically intact survival than the 50 A 17-year retrospective analysis CLINICAL STATEMENTS AND GUIDELINES did not demonstrate any difference between men and women, although total outcomes improved.S10.6-17 The proportion of ischemic heart disease-associated SCAs among women surviving out-of-hospital cardiac arrest was significantly lower than in men, but ischemic heart disease remained the most powerful predictor and women were also significantly less likely to have severe LV dysfunction (LVEF 35%) or previously recognized ischemic heart disease.S10.6-19 Women appear to be less likely to benefit from thera- peutic hypothermia postcardiac arrest; however, in the younger age group, neurologic recovery in women was better than in older women.S10.6-20 Women are less likely to have SCA during competitive athletic events. 