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cohort
(ko´hort)
in research and statistics, a group of individuals who share a characteristic at some specific time and who are then followed
forward in time, with data being collected at one or more suitable intervals. The most common use of the term is to describe
a birth cohort, in which all the group members are born in a specified time period, but other common characteristics could define the cohort,
such as marriage date, exposure to an infectious agent, or date of diagnosis or of treatment for a disease.
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