성별로는 남성은 30∼40대의 40∼50%이고, 여성은 30대 이후 유병률이 늘어나면서 60∼70대 이상에서 남성보다 유병률이 높다.
By gender, 40-50% of males in their 30s to 40s, and women in their 60s to 70s have a higher prevalence than men as the prevalence increases after their 30s.