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The author’s reply:
  1. C E Raphael
  1. Dr C E Raphael, International Centre for Circulatory Health, St Mary’s Hospital and Imperial College, 59 North Wharf Rd, London W2 1LA, UK; claire.raphael{at}

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Dr Petrie highlights an interesting study by Grigorian-Shamagian et al1 which showed that changes in systolic blood pressure (SBP) over a 1.9 year follow-up period do not correlate with changes in mortality, despite the relationship between a low baseline SBP and a higher mortality within the study population. The study is interesting for two reasons.

First, as Petrie points out, …

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  • Competing interests: None declared.

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