Question
In a study on incidence rate of disease X, that involved observing 8 participants over 5 years, 2 of the participants died after 2 years,
In a study on incidence rate of disease X, that involved observing 8 participants over 5 years, 2 of the participants died after 2 years, one quit the study after 3 years, and one became ill with disease X after 4 years. How many person-years of observation were done at the end of the study?
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Geometry, Its Elements And Structure
Authors: Alfred S Posamentier, Robert L Bannister
2nd Edition
0486782166, 9780486782164
