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  • The number needed to treat provides additional insight on the performance of detection points of asthma exacerbations in self-management plans

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Correspondence
The number needed to treat provides additional insight on the performance of detection points of asthma exacerbations in self-management plans
  1. Persijn J Honkoop,
  2. Jacob K Sont
  1. Department of Medical Decision Making, Leiden University Medical Center, Leiden, Zuid Holland, The Netherlands
  1. Correspondence to P J Honkoop, Department of Medical Decision Making, Leiden University Medical Center, Postzone J-10-s, room J-10-87, Albinusdreef 2, PO Box 9600, Leiden, Zuid Holland 2300 RC, The Netherlands; p.j.honkoop{at}lumc.nl

https://doi.org/10.1136/thoraxjnl-2013-203853

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    With interest we have read the paper of Kupczyk et al.1 It is an important contribution to the current understanding of the course and early detection of asthma exacerbations, especially with the advent of internet-based self-management programmes using daily or weekly monitoring.2 In the current research the authors found that the combination of a 20% decrease in peak expiratory flow (PEF) on 2 consecutive days or a 20% increase in day symptoms on 2 consecutive days optimally detects an exacerbation with …

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    Footnotes

    • Contributor PH wrote the correspondence. JS provided comments.

    • Competing interests None.

    • Provenance and peer review Not commissioned; internally peer reviewed.

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