Short Course @ GRAPPA: Introduction to Epidemiology Home » Short Course @ GRAPPA: Introduction to Epidemiology Introduction to the course Analysis Bias and confounding Disease registries and real world data for studying PsD Fundamentals of Study Designs Workshop – Calculating the risk for PsA and predicting outcomes Special cases: Risk, predicting, and confounding by indication in Psoriatic Disease Workshop – Does weight loss improve risk for PsA? Wrap up and Goodbye