percentage of study population developing leukemia during a period of time +
percentage of study population displaying leukemia at a point in time +
The number of individuals in a study population which display leukemia, any of a group of progressive, malignant diseases of the blood-forming organs, marked by distorted proliferation and development of leukocytes and their precursors in the blood and bone marrow, at a certain point in time compared to the total number of individuals in the study population, expressed as a percentage.