Prognosis: The probable outcome or course of a disease; the patient's chance of recovery.
Case-control study: It is a type of observational study in which two existing groups differing in outcome are identified and compared on the basis of some supposed causal attribute.
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.