Epidemiology thumb|Most common causes of hyperthyroidism by age Graves' disease occurs in about 0.5% of people. Graves' disease data has shown that the lifetime risk for women is around 3% and 0.5% for men. It occurs about 7.5 times more often in women than in men and often starts between the ages of 40 and 60. It is the most common cause of hyperthyroidism in the United States (about 50 to 80% of cases).
Epidemiology thumb|Most .common causes of hyperthyroidism by age Graves' disease occurs in about 0.5% of people. Graves' disease data has shown that the lifetime risk for women is around 3% and 05% for men. It occurs about 7.5 times more often in women than in men and often starts between the ages of 40 and 60. It is the most common cause of hyperthyroidism in the United States (about 50 to 80% of cases).