Total and age-specific incidence of Graves' thyrotoxicosis, toxic nodular goitre and solitary toxic adenoma in Malmö 1970-74.

During a 5-year period, 333 new cases of thyrotoxicosis were diagnosed in a well-defined urban population of 258,000 inhabitants in southern Sweden without a history of endemic goitre. This corresponds to a mean annual incidence of thyrotoxicosis of 25.8/100,000. The incidence of Graves' disease was 17.7, the incidence of toxic nodular goitre was 5.4 and that of solitary toxic adenoma was 2.7/100,000/year. The peak age-specific incidence of Graves' disease was 32.6/100,000/year (age group 60-69 years), and that of toxic nodular goitre and solitary toxic adenoma was 31.5/100,000/year (age group over 80 years).