biological replicate role cohort role In statistics and demography, a cohort is a group of subjects - most often humans from a given population - defined by experiencing an event (typically birth) in a particular time span. Wikipedia "cohort", Feb 29 2008 WEB:http://www.sceoc.com/glossaryofterms/ # a group of individuals having a statistical factor (as age or class membership) in common in a demographic study, such as a cohort of students. Jennifer Fostel a cohort role is a biological replicate role played by a group of study participants who share a common characteristic of interest to the study. cohort role WEB:http://www.thebody.org/content/treat/art2612.html # a group of individuals in a study who share a demographic, clinical, or other statistical characteristic (eg, age, study site). WEB:http://www.uhhospitals.org/tabid/591/Default.aspx # A cohort is a group of people with a common characteristic that is studied over a period of time as part of a scientific or medical investigation. metadata incomplete