Clinical Study: A research study in which patients receive treatment in a clinic or other medical facility. Reports of clinical studies can contain results for single patients (case reports) or many patients (case series or clinical trials).
Prognosis: The probable outcome or course of a disease; the patient's chance of recovery.
Cohort study: Cohort studies are a type of medical research used to investigate the causes of disease, establishing links between risk factors and health outcomes.
Systematic review: A systematic review answers a defined research question by collecting and summarizing all empirical evidence that fits pre-specified eligibility criteria.