Cause-specific mortality and years of life lost in patients with different manifestations of vascular disease

Abstract

Background: Patients with cardiovascular disease might be at increased risk of non-vascular mortality due to shared risk factors. Our aim was to evaluate causes of death and years of life lost (YLL) in patients with different manifestations of vascular disease.

Design: The design was a prospective cohort study.

Methods: A total of 5911 patients with stable coronary artery disease, cerebrovascular disease, peripheral artery disease (PAD), abdominal aortic aneurysm or polyvascular disease were followed-up for mortality. Cause-specific standardised mortality ratios (SMRs) and YLL, compared to the Dutch population, were estimated. Determinants for cause-specific mortality were evaluated using competing risks models.

Results: During a median follow-up of 6.0 years (interquartile range (IQR): 3.1-9.2), 958 (16.2%) patients died. All-cause mortality was increased compared to the general population (SMR: 1.26, 95% confidence interval (CI): 1.18-1.34). Patients with PAD and polyvascular disease were at highest risk, especially for ischaemic heart disease (SMR: 2.52, 95% CI: 1.70-3.60 and SMR: 3.97, 95% CI: 3.18-4.90, respectively). Patients with PAD were at increased risk of dying from cancer (SMR: 1.67, 95% CI: 1.25-2.17). On average, patients with vascular disease of ≥50 years died 7.8 years younger than the general population, with 80% of the excess YLL attributable to cardiovascular disease. In middle-aged patients the excess YLL were about 10 years, of which 24% were lost due to cancer. Important determinants for mortality were male gender, smoking, physical inactivity, renal insufficiency and polyvascular disease.

Conclusions: Patients with manifest vascular disease are at increased risk of both cardiovascular and cancer mortality, particularly patients with PAD or polyvascular disease. On average, patients with vascular disease of ≥50 years die 7.8 years younger than the general population.

Keywords: Cardiovascular disease; cause of death; competing risks; mortality; years of life lost.