Cohort

Cohort
In statistics and demography, a cohort is a group of subjects who have shared a particular experience during a particular time span[1] (e.g., people born in 1950; Irish women born in 1970; truck drivers who smoked between age 30 and 40). Cohorts may be tracked over extended periods of time in a cohort study. The cohort can be modified by censoring, i.e. excluding certain individuals from statistical calculations relating to time periods (e.g. after death) when their data would contaminate the conclusions

cohort