Descriptive Epidemiology, Case Reports, Case Series, Cross-Sectional Studies, and Ecologic Studies.

Describe and explain the distinguishing features of descriptive studies, including case reports and case series, cross-sectional studies, and ecologic studies. Describe and identify the types of epidemiologic questions that can be addressed by descriptive studies. Identify the strengths and limitations of case reports and series, cross-sectional studies, and ecologic studies Estimate and interpret measures of association from cross-sectional studies Explain the concept “ecologic fallacy”