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Mortality in COPD patients according to clinical phenotypes
Rafael Golpe1, María Suárez-Valor1, Irene Martín-Robles1
1Respiratory Medicine Service, University Hospital Lucus Augusti, Lugo, Spain.
Summary
Classifying chronic obstructive pulmonary disease (COPD) patients into phenotypes reveals significant differences in mortality. The asthma-COPD overlap (ACO) phenotype shows the best prognosis, while the emphysema phenotype (EXEMPH) carries the highest mortality risk.
Area of Science:
- Pulmonology
- Clinical Medicine
- Epidemiology
Background:
- Clinical phenotyping of chronic obstructive pulmonary disease (COPD) may aid disease management.
- Prognostic implications of COPD phenotypes require further clarification.
Purpose of the Study:
- To evaluate if mortality rates differ among four predefined COPD clinical phenotypes.
- To assess the prognostic value of COPD phenotyping.
Main Methods:
- Retrospective observational study of 891 COPD patients at a university hospital.
- Patients classified into asthma-COPD overlap (ACO), nonexacerbator (NONEX), exacerbator with chronic bronchitis (EXCB), and exacerbator with emphysema (EXEMPH) phenotypes.
- Comparison of all-cause mortality outcomes between phenotypes over a mean follow-up of 48.4 months.
Main Results:
- Significant differences in all-cause mortality were observed across phenotypes (194 deaths, 21.8%).
- Asthma-COPD overlap (ACO) phenotype demonstrated the best long-term prognosis.
- Exacerbator with emphysema (EXEMPH) phenotype exhibited the highest mortality risk, including death due to COPD itself.
Conclusions:
- COPD phenotyping identifies patient subgroups with distinct mortality outcomes and causes of death.
- Observed mortality differences are linked to underlying COPD severity and comorbidity burden rather than the classification itself.
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