Journal of Population Sciences
Table 1 Definitions of the six time measures
Time measure | Demographic definition | Event history definition |
|---|---|---|
A—chronological age | Time since birth | Time since start of exposure |
P—period | Calendar time | Calendar time |
C—birth cohort | Calendar time of birth | Calendar time of exposure start |
T—thanatological age | Time until death | Time until event |
D—death cohort | Calendar time of death | Calendar time of event |
L—lifespan | Duration of life | Duration of exposure |