Cumulative Incidence Flashcards
1
Q
Cumulative incidence
A
Cumulative incidence = the proportion of a candidate population that becomes diseased over a specified period of time
Note that the numerator (new cases of disease) is a subset of the denominator (candidate population), and so the possible value of cumulative incidence ranges from 0 to 1 or, if expressed as a percentage, from 0 to 100%.
Cumulative incidence can be thought of as the average risk of getting a disease over a certain period of time. (A risk is the probability of getting a disease.) A commonly cited measure of cumulative incidence is the lifetime risk’.
Cumulative incidence is usually reserved for fixed populations, particularly when there are no or few losses to follow-up.
