The effect of chronic sputum production on respiratory symptoms in severe COPD.

@article{Kim2011TheEO,
  title={The effect of chronic sputum production on respiratory symptoms in severe COPD.},
  author={Victor Kim and Jamie L Garfield and Carla L Grabianowski and Jason S Krahnke and John P. Gaughan and Michael R. Jacobs and Gerard J. Criner},
  journal={COPD},
  year={2011},
  volume={8 2},
  pages={114-20}
}
BACKGROUND Chronic sputum production is a significant but variable complaint in COPD; its effect on symptom burden has not been comprehensively described. We sought to characterize the daily burden of chronic sputum production in severe COPD and the phenotype of those with chronic sputum symptoms. METHODS We studied 50 outpatients with severe COPD who used an electronic diary to document peak expiratory flow (PEF) and respiratory symptoms daily for up to 2 years. A sputum index was derived… CONTINUE READING

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