There are several different types of studies that can help make data from research credible and therefore useful to healthcare managers and leaders. Credible data is vital to making safe decisions. From thorough research of at least three credible sources, please discuss the following tools used in research:

Case-control studies
Cohort studies, retrospective and prospective
Randomized clinical trials
Include the following key concepts in your discussion of each study:

Data that can be collected and used by healthcare leaders and managers
Inherent biases
Cost effectiveness
Level of reliability using the hierarchy of evidence rating method
An example of the study