This document provides an introduction to key concepts in primary care research. It discusses how to formulate a research question and understand the differences between quantitative and qualitative research approaches. The major steps in the research process are outlined as identification of a problem, literature review, specifying questions/hypotheses, determining methodology, data collection and analysis, and interpreting findings. Common quantitative study designs like cross-sectional, case control, cohort, and randomized controlled trials are explained. The document also covers using secondary data sources for research.