| Abstract | A summary of a research paper. |
| Acceptability | An implementation outcome:the perception among stakeholders that an intervention is agreeable |
| Adoption | An implementation outcome: the intention, decision, or action to try to implement an intervention. |
| Appropriateness | An implementation outcome:the perceived fit, suitability, or relevance of an intervention in a particular setting or for a particular target audience. |
| Prospective | People are recruited into cohort studies regardless of their exposure or outcome status. |
| Cohort study | A cohort study uses one or more cohorts (groups of individuals) to look at how events differ within the group, they can be prospective or retrospective |
| Case control studies | Compares patients who have a disease or outcome of interest (cases) with patients who do not have the disease or outcome (controls), |
