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Correspondence
Reaching the wrong conclusion: residual confounding by indication
  1. Jonathan A Batty1,
  2. Alistair S Hall2
  1. 1 Institute of Applied Health Sciences, University of Birmingham, Birmingham, West Midlands, UK
  2. 2 Department of Cardiology, Leeds General Infirmary, Leeds, West Yorkshire, UK
  1. Correspondence to Dr Jonathan A Batty, Institute of Applied Health Sciences, University of Birmingham, Birmingham, West Midlands, UK; jonathan.batty{at}mail.harvard.edu

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To the Editor In a recent edition of Heart, Potier et al reported the results of a large, observational analysis of the REACH registry.1 The authors sought to retrospectively compare clinical outcomes in angiotensin receptor blocker (ARB) and ACE inhibitor (ACEi) treated patients, using propensity score matching to reduce confounding by indication. They conclude that treatment with ARB was more effective than with ACEi, across a wide spectrum of cardiovascular diseases and with regard to a number of different clinical outcomes. However, we …

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