Treatment Evolution After COPD Diagnosis in the UK Primary Care Setting

PLoS One. 2014 Sep 2;9(9):e105296. doi: 10.1371/journal.pone.0105296. eCollection 2014.

Abstract

Rationale: To assess the treatment progression during the 24 months following a formal diagnosis of chronic obstructive pulmonary disease (COPD) in the UK primary care setting.

Methods: A retrospective cohort of newly diagnosed COPD patients was identified in the Clinical Practice Research Datalink (CPRD) from 1/1/2008 until 31/12/2009. Maintenance therapy prescribed within the first 3 months of diagnosis and in the subsequent 3-month intervals for 24 months were analyzed. Treatment classes included long-acting β2-agonists (LABAs), long-acting muscarinic antagonists (LAMAs), inhaled corticosteroids (ICSs), and respective combinations. At each 3-month interval, discontinuation, switching, addition, and stepping down patterns were analyzed cumulatively for the first 12 months and over the 24-month of follow-up.

Results: A total of 3199 patients with at least one prescription of a maintenance therapy at baseline and during 4th-6th month interval were included in the analysis. At diagnosis (0-3 months), the most frequently prescribed maintenance therapy was LABA+ICS (43%), followed by LAMA (24%) and LABA+LAMA+ICS (23%). Nearly half the patients (LABA-50%, LAMA-43%) starting on a monobronchodilator had additions to their treatment in 24 months. Compared to other medications, patients starting on a LAMA were most likely to escalate to triple therapy in 24 months. Nearly one-fourth of the patients prescribed triple therapy at baseline stepped down to LABA+ICS (25%) or LAMA (31%) within 24 months.

Conclusion: Disease progression is evident over the 24 months after COPD diagnosis, as more patients were prescribed additional maintenance therapy in the 24-month period compared to baseline. The changes in therapy suggest that it is difficult to achieve a consistently improved COPD disease state.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Demography
  • Drug Prescriptions
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Primary Health Care*
  • Pulmonary Disease, Chronic Obstructive / diagnosis*
  • Pulmonary Disease, Chronic Obstructive / drug therapy*
  • United Kingdom

Grant support

Funding for this study was provided by GlaxoSmithKline. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. The funder provided support in the form of salaries for authors [KEW, YSP, AS], but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.