Which analytic used in healthcare is calculated as a proportion of new cases compared to person-time units?

Cumulative incidence represents the proportion of a population that develops a disease over a specified period but does not account for the time individuals are at risk. It is calculated merely as the number of new cases divided by the total population at the start of the observation period, lacking the person-time aspect that characterizes the incidence rate.

Morbidity rate generally refers to the incidence or prevalence of disease within a population but does not specifically focus on new cases relative to person-time. It can encompass both new and existing cases, making it a broader measure that does not accurately reflect the speed of new case occurrences in the context of time.

Prevalence measures the total number of existing cases of a disease in a population at a given time, without considering the time individuals have been affected. Unlike incidence rate, which emphasizes new cases and time at risk, prevalence captures all cases, thus failing to provide the same insight into disease dynamics.