material entity material entity Population Group Population_Group Subpopulation C17005 A group of individuals united by a common factor (e.g., geographic location, ethnicity, disease, age, gender) CDISC-GLOSS Population Group population Population Group Group C1257890 Population Group Any finite or infinite collection of subjects from which a sample is drawn for a study to obtain estimates for values that would be obtained if the entire population were sampled. [AMA style Manual] Population