Study designs: Part 1 - An overview and classification

Perspect Clin Res. Oct-Dec 2018;9(4):184-186. doi: 10.4103/picr.PICR_124_18.


There are several types of research study designs, each with its inherent strengths and flaws. The study design used to answer a particular research question depends on the nature of the question and the availability of resources. In this article, which is the first part of a series on "study designs," we provide an overview of research study designs and their classification. The subsequent articles will focus on individual designs.

Keywords: Epidemiologic methods; research design; research methodology.