Long-term survival of patients with chronic obstructive pulmonary disease undergoing coronary artery bypass surgery

Area of Science:

• Cardiology
• Pulmonology
• Surgical Outcomes

Background:

• Chronic obstructive pulmonary disease (COPD) is linked to higher in-hospital mortality after coronary artery bypass surgery (CABG).
• Long-term survival data for COPD patients post-CABG is limited.
• This study investigates the impact of COPD on long-term survival following CABG.

Purpose of the Study:

• To evaluate the long-term survival rates of patients who underwent coronary artery bypass surgery (CABG).
• To specifically assess the impact of chronic obstructive pulmonary disease (COPD) on survival after CABG.
• To compare survival outcomes among patients with no comorbidities, COPD alone, other comorbidities, and COPD with other comorbidities.

Main Methods:

• Prospective study of 33,137 isolated CABG patients (1992-2001).
• Long-term mortality data obtained by linking records to the National Death Index.
• Cox proportional hazards regression used to determine hazard ratios (HRs) and adjust for comorbidities.

Main Results:

• Overall incidence rate of death was 4.1 per 100 person-years.
• Survival rates varied significantly by comorbidity status (log rank P<0.001).
• COPD alone (HR 1.8) and other comorbidities (HR 2.2) significantly reduced survival compared to no comorbidities. Patients with both COPD and other comorbidities had the worst survival (HR 3.6).

Conclusions:

• Patients with chronic obstructive pulmonary disease (COPD) alone experience significantly reduced long-term survival after coronary artery bypass surgery (CABG) compared to those without comorbidities.
• The presence of COPD in conjunction with one or more other comorbidities results in the poorest long-term survival rates following CABG.