Trends in mortality risks among 94,328 patients surviving 30days after a first isolated coronary artery bypass graft procedure from 1987 to 2006: A population-based study

5 years ago

Trends in mortality risks among 94,328 patients surviving 30days after a first isolated coronary artery bypass graft procedure from 1987 to 2006: A population-based study

Updated knowledge about survival after coronary artery bypass graft (CABG) surgery is needed. We examined 20-year trends in 4-year survival after a first isolated CABG procedure, compared with that of the general population.

Methods

We identified 94,328 patients surviving 30days after a first isolated CABG 1987–2006 from the Swedish Inpatient Register.

Results

Crude annual mortality rates remained stable at approximately 1% in patients aged 18–54years and at approximately 2% in those aged ≥55years. After adjustment for comorbidities, 4-year survival in men aged 18–54 and ≥55years improved by 37% (HR: 0.63, 95% CI, 0.46–0.88) and 31% (HR: 0.69, 95% CI, 0.63–0.76), respectively, (1987–1991 vs. 2002–2006). The corresponding estimate for women aged ≥55years was 38% (HR: 0.62, 95% CI, 0.52–0.75), with no significant change in survival in women aged <55years (HR: 1.02, 95% CI, 0.52–2.03). Men and women aged <55years had higher mortality than the general population, with standardized mortality ratios (SMR) of 1.76 (95% CI, 1.35–2.22) in men and 4.49 (95% CI, 2.74–6.68) in women during the last period (2002–2006). In contrast, patients aged ≥55years had better survival with a SMR of 0.74 (95% CI, 0.70–0.78) in men and 0.82 (95% CI, 0.74–0.91) in women during 2002–2006.

Conclusion

During 1987–2006, there was a significant improvement in survival after CABG for all categories, except in women aged <55years. Men and women aged ≥55years who survived the first 30days after CABG had a lower mortality risk than the general population.

Publisher URL: www.sciencedirect.com/science

DOI: S0167527316341158