Epidemiology

Incidence of essential thrombocythaemia (ET) in the US is reported to be 1.55 per 100,000 person-years (data from 2002 to 2016).[12]​ In Europe, incidence is between 0.38 and 1.7 per 100,000 persons per year.[13] In the UK, annual incidence of ET is 4.2 per 100,000, with an estimated 2,720 people newly diagnosed each year (data from 2010 to 2019).[14]​​

ET occurs more commonly in females (male to female rate ratio approximately 0.8).[12][14]​​ Incidence is highest among black people in the US.[12] ET more commonly affects older people (approximately 66% of patients in the US are age ≥60 years at diagnosis), but younger people may develop the disease.[12]​ Median age at diagnosis is 67 years in the US, and 72 years in the UK.[12][14]​​

Prevalence in the general population is approximately 30 to 60 per 100,000.[15][16][17][18]

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