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Spirometry utilization for COPD: how do we measure up?

Meilan K Han1, Min Gayles Kim, Russell Mardon

  • 1Division of Pulmonary and Critical Care Medicine, University of Michigan Health System, Ann Arbor, MI 48109-0360, USA. mrking@umich.edu

Chest
|June 7, 2007
PubMed
Summary
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Spirometry confirmation for COPD diagnosis is recommended but infrequently used in practice. Only 32% of new COPD patients received this crucial test, with usage decreasing in older individuals.

Area of Science:

  • Pulmonary Medicine
  • Health Services Research

Background:

  • Chronic Obstructive Pulmonary Disease (COPD) significantly contributes to illness and death.
  • Clinical guidelines emphasize spirometry for confirming COPD diagnoses.
  • Evidence on real-world spirometry utilization for COPD is limited.

Purpose of the Study:

  • To determine the frequency of spirometry use in patients newly diagnosed with COPD.
  • To analyze spirometry utilization patterns based on patient demographics and age.

Main Methods:

  • Retrospective analysis of administrative data from five health plans (July 2002-June 2003).
  • Identification of patients aged 40+ with new COPD diagnoses using ICD-9 codes.
  • Assessment of spirometry use within a 2-year pre-diagnosis to 6-month post-diagnosis window.

Related Experiment Videos

Main Results:

  • Out of 5,039 eligible COPD patients, approximately 32% underwent spirometry.
  • Spirometry use was highest in the 40-64 age group and decreased with advancing age, particularly for those 75+.
  • Women showed a slightly higher rate of spirometry use (33.5%) compared to men (29.4%).

Conclusions:

  • Spirometry is underutilized in the clinical diagnosis of COPD, with only a third of patients receiving the test.
  • Age is a significant factor, with older patients less likely to undergo spirometry.
  • Findings indicate a need for practice improvements to enhance spirometry adherence for COPD diagnosis.