What Are the Main Types of Epidemiological Studies?

There are several types of epidemiological studies, each serving different purposes:

Descriptive studies: These studies describe the occurrence of diseases within a population.
Analytical studies: These investigate the causes and associations of diseases. They include cohort studies, case-control studies, and cross-sectional studies.
Experimental studies: These involve interventions to determine their effects on disease outcomes. Randomized controlled trials (RCTs) are a common type of experimental study.