Discuss the assumption that explains why one subtracts one h

Discuss the assumption that explains why one subtracts one half of the total number of censored observations from the denominator when calculating cumulative incidence.

Solution

Incidence is a measure of the occurrence of new cases of disease during a span of time. A cumulative incidence will specify a time period.  It measures the number of new cases per person in a population over a defined period of time.

In cumulative incidence, the denominator is total number of population . And the numerator is the number of new persons in the population affected.

Cumulative incidence = no. of disease onsets/ no. initially at risk

In this only new onsets are considered hene one substrates the one half of the total number of censored observation from the denominator.