COPD – Risk Factor for Complex Chronic Comorbidities, a Retrospective Case-Control Study

Background: Increasing evidence indicates that chronic obstructive pulmonary disease (COPD) is a complex disease involving more than airflow obstruction. Systemic inflammation can initiate or worsen comorbid diseases, such as ischemic heart disease, heart failure, arrhythmia, diabetes, osteoporosis, lung cancer and depression.
Material and method: We explored the Medprax database, from an ambulatory care in order to obtain rates of comorbidities in COPD patients. Medprax electronic database is a locally developed system designed to fulfil the requirements of an integrated healthcare system. We identified a population of 9,659 patients (4472 men and 5187 women) aged ≥ 30 years registered between 01.01.2000 and 01.02.2010.
Results: The overall prevalence of COPD was 5.17% (384 men and 116 women). Compared to the non-COPD patients, COPD was found to be a significant risk factor in both sexes for cardiovascular events: ischemic heart disease (OR = 3.06, 95%CI 2.54–3.68), atrial fibrillation (OR = 2.70, 95%CI 2.12–3.43) and heart failure (OR = 4.49, 95%CI 3.74–5.40) regardless of age. Association with diabetes mellitus type 2 was extremely significant in COPD men (OR = 1.69, 95%CI 1.26–2.27), but not in COPD women. Significant correlation with osteoporosis (OR = 3.26, 95%CI 1.94–5.48) was found only in women over 60 years and men under 60. Pulmonary malignancy was found only in male COPD patient compared to non-COPD patients (OR = 5.04, 95%CI 2.02–12.44). The impact on
depressive disorders was noted only in younger COPD men (OR = 5.71, 95%CI 1.94–16.82).
Conclusions: Our results indicate that COPD is a risk factor for all these comorbid conditions and that in the management of COPD all these conditions need to be carefully evaluated.