Figure 5From: Pearls and perils of an implantable defibrillator trial using a common control: implications for the design of future studiesHazard ratios for subgroups of patients treated with amiodarone or a defibrillator as compared with placebo in the Sudden Cardiac Death in Heart Failure Trial (SCD-HeFT). Abbreviations: ft = feet; ICD = implantable defibrillator; LVEF = left ventricular ejection fraction. (Copyright 2005, Massachusetts Medical Society [5]. All rights reserved.).Back to article page