Cohort A group of participants who are similar to each other. How to say: Cohort Click image to enlarge An example of cohort is people who have low back pain. USE IN A SENTENCE Data were collected from a cohort of smokers for 20 years to see if the participants developed health problems. MORE INFO A cohort is a group of people who are in an observational study to see how a disease or health condition develops. WORDS RELATED TO COHORT arm observational study study cohort study group WORDS OPPOSITE TO COHORT OTHER RESOURCES If you know of another resource that could help explain this term, please contact us!