selection criterion eligibility criterion A limited list of criteria for selection of participants in the clinical study, provided in terms of inclusion and exclusion criteria and suitable for assisting potential participants in identifying clinical studies of interest. The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex Adapted from Clinical Research Glossary Version 4.0 CDICS glossary group PMID: 17579629 -Eligibility criteria included: untreated ED-SCLC; age >/=70 and performance status 0-2, or age <70 and PS 3. Person: Philippe Rocca-Serra an eligibility criterion (rule) is_a selection criterion which defines and states the requirements (positive or negative) for an entity to be considered as suitable for a given task or participation in a process. eligibility criterion eligibility rule ready for release