Slide 1Sample Size Calculation PD Dr. Rolf Lefering IFOM - Institut für Forschung in der Operativen Medizin Universität Witten/Herdecke Campus Köln-Merheim Slide 2 sample…
Slide 1Is There An Association? Exposure (Risk Factor) Outcome Slide 2 Target Population Study population Collect data Make comparisons Is there an association? Are the results…