Ø 2D RESOURCE: Does Choice of Control Group Affect the Association of Antibiotics With Clostridium difficile-Associated Diarrhea? Tools and Resources Purpose: A poster showing the process of describing if choice of control group affects the association of antibiotics with Clostridium difficile-associated diarrhea.Source: Developed by P. Chung, Y. Gao, and B. Ostrowsky, Montefiore Medical Center, for 2011 Society for Healthcare Epidemiology of America annual meeting. Abstract available at: http://shea.confex.com/shea/2011/webprogram/Paper4443.html.Instructions: Use as a reference.Return to Question 2 Current as of September 2012 Internet Citation: Ø 2D RESOURCE: Does Choice of Control Group Affect the Association of Antibiotics With Clostridium difficile-Associated Diarrhea?: Tools and Resources. September 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/professionals/quality-patient-safety/patient-safety-resources/cdifftoolkit/cdiffl2tools2d.html