A patient cohort refers to a group of individuals who share common characteristics or experiences and are studied over a period of time in medical research. This research area involves identifying and recruiting a specific group of patients with similar conditions or traits to study various aspects of their health outcomes, treatments, and responses to interventions. Patient cohorts can help researchers understand the natural history of diseases, evaluate the effectiveness of treatments, and identify potential risk factors or predictors of disease progression. The data collected from patient cohorts can provide valuable insights into improving patient care and developing personalized medicine approaches.