38. Understanding Cohort and Longitudinal Studies

About this lesson

In this module, we continue exploring non-experimental research methods with a focus on cohort and longitudinal study designs: critical tools in healthcare and public health research. These time-based designs allow researchers to track exposures, outcomes, and health trajectories across populations.

What You’ll Learn

• Cohort Studies

• Follows groups over time

• Establishes exposure-outcome relationships

• Uses prospective and retrospective designs

• Calculates relative risk and risk difference

• Longitudinal Studies

• Involves repeated observations over time

• Tracks individual changes and condition progression

• Useful for studying development patterns

• Deals with challenges like attrition

• Design Comparison

• Cross-sectional vs. case-control vs. cohort designs

• Trade-offs in time, cost, feasibility, and analytical strength

• Choosing the right design for your research question

Who This Is For

Public health students, MPH candidates, medical researchers, and healthcare professionals who need to understand the strengths and limitations of time-oriented observational studies.

Lesson notes

Full written notes for this lesson are in production. Until they publish, watch the video above and use the summary on this page as your study guide.