Sample Category Statistics.

Mean value and standard deviation of age, mutation burden, white blood cell count, red blood cell count, hemoglobin, hematocrit, and platelet count at the time of blood sampling are shown. Numbers of females and males are shown. The normal range of each test is indicated in the brackets with female (F) or male (M)-specific ranges if available. Categories based on disease are: PV for polycythemia vera; ET for total cases of essential thrombocythemia; ET+ for V617F-positive ET, ET− for V617F-negative ET; and control for healthy volunteers. Group 1, group 2, and group 3 represents cases with a V617F mutation burden 50%–100%, 1%–50%, and 0%–1%, respectively.