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Correspondence
Author's response
  1. Inga-Cecilie Sørheim1,2,
  2. Ane Johannessen3,
  3. Amund Gulsvik2,4,
  4. Per S Bakke2,4,
  5. Edwin K Silverman1,5,
  6. Dawn L DeMeo1,5
  1. 1Channing Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
  2. 2Institute of Medicine, University of Bergen, Bergen, Norway
  3. 3Centre for Clinical Research, Haukeland University Hospital, Bergen, Norway
  4. 4Department of Thoracic Medicine, Haukeland University Hospital, Bergen, Norway
  5. 5Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
  1. Correspondence to Dawn L. DeMeo, M.D., M.P.H.Channing Laboratory,181 Longwood Avenue,Boston, MA 02115, USA; dawn.demeo{at}channing.harvard.edu

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We thank Dr Miller and colleagues for their valuable comments1 on our recent article. Our findings2 suggested a gender difference in susceptibility to the lung damaging effects of cigarette smoking. Female gender was associated with lung function reduction and more severe disease in COPD subjects with early-onset of disease or low smoking exposure. Interaction analysis also suggested that the effect of smoking on lung function might be different by gender.

Miller and colleagues question the use of lung function measurements expressed as per cent of predicted values, suggesting that this approach may introduce a gender bias. They argue that our prediction equations automatically make low results for women appear worse than equivalently …

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Footnotes

  • Linked article 152348.

  • Competing interests None.

  • Provenance and peer review Not commissioned; not externally peer reviewed.

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