Background: There is a paucity of data on the sex differences in the prevalence, clinical presentation, and prognosis of aortic stenosis (AS).
Methods and Results: A total of 3,815 consecutive patients with severe AS were enrolled in the multicenter CURRENT AS registry between January 2003 and December 2011. The registry included 1,443 men (38%) and 2,372 women (62%). Women were much older than men (79 +/- 10 vs. 75 +/- 10 years, P<0.0001), and the ratio of women to men increased with age. The cumulative 5-year incidence of all-cause death was significantly higher in men than in women (47% vs. 41%, P=0.003), although women were more symptomatic and much older. The 5-year mortality was similar between men and women at age <65 years (16% vs. 15%, P=0.99), whereas it was significantly higher in men than in women at age >= 65 years (65-74 years, 38% vs. 19%, P<0.0001; 75-84 years, 55% vs. 34%, P<0.0001; >= 85 years: 82% vs. 72%, P=0.03).
Conclusions: A large Japanese multicenter registry of consecutive patients with severe AS included a much higher proportion of women than men, with the female: male sex ratio increasing with age. The 5-year mortality rate of women was lower than that of men. Lower 5-year mortality rates in women were consistently seen across all age groups >65 years.