How Healthcare Researc Is Useful.

At the population level, analysis of secondary data can be used to monitor secular trends, assess specific diseases or treatments, analyze health-care , and may serve as an important resource to inform policy decision-making. These data are quite useful as one can often draw conclusions about very large populations without expending the resources required by primary data collection. In addition, because sample sizes are often large, secondary data analysis is quite appropriate to study rare diseases or events.