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. Author manuscript; available in PMC: 2014 Jul 2.
Published in final edited form as: J Cyst Fibros. 2011 Jul 30;10(6):453–459. doi: 10.1016/j.jcf.2011.07.003

Figure 2. Sample Sizes Required per Study Arm to Retain 80% Power to Detect a 40% Reduction in Risk of Treatment for Exacerbation as a Function of Lung Disease Stage and Study Duration.

Figure 2

Panel A: Sample sizes required to detect a reduction in treatment with “any” antibiotics. Panel B: Sample sizes required to detect a reduction in treatment with IV antibiotics. Note that the scale of the vertical axis of panel B is twice the magnitude of that of panel A.