Personenjahre
Personenjahre is a unit of time used in epidemiology and public health to quantify the amount of observation time during which study participants are at risk. One Personenjahr corresponds to one person being observed for one year. For example, ten participants observed for six months each contribute five Personenjahre of observation time.
Computation and interpretation: To determine the total Personenjahre in a study, sum the follow-up time for
Advantages and limitations: Using Personenjahre allows comparison of risk when participants have different lengths of follow-up
Applications and relation to other measures: Personenjahre are widely used in cohort studies, clinical trials, and