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The influence of statins on aortic aneurysm after operation: A retrospective nationwide study

Kuang-Ming Liao1, Shih-Wei Wang2,3, Chun-Hui Lu4

  • 1Department of Internal Medicine, Chi Mei Medical Center, Chiali.

Medicine
|April 28, 2019
PubMed

Insights

Statin use after aortic aneurysm (AA) surgery may reduce mortality. This study found lower death rates in patients taking statins post-operation, though reoperation and rehospitalization rates were similar. Further research is needed.

Area of Science:

  • Cardiovascular Medicine
  • Pharmacology
  • Public Health

Background:

  • Aortic aneurysm (AA) presents significant healthcare challenges and high mortality risk, particularly upon rupture.
  • Statins possess non-lipid-lowering pleiotropic effects with potential benefits for AA progression and patient outcomes.
  • Previous research on statins for AA has limitations, including unaddressed immortal time bias, lag time, and adherence issues.

Purpose of the Study:

  • To investigate the impact of statin use on postoperative outcomes in patients with aortic aneurysm (AA).
  • To control for confounding factors such as immortal time bias, lag time, and medication adherence in the analysis.
  • To evaluate the effect of statins on mortality, reoperation, and rehospitalization rates in AA patients post-surgery.

Main Methods:

  • Retrospective cohort study using Taiwan's National Health Insurance Research Database (2004-2012).
  • Inclusion of postoperative AA patients, excluding those without CT scans within a year or who died within 30 days.
  • Analysis of medication possession ratio (MPR), immortal time bias, and lag time; statin users defined as those with >30 days of use.

Main Results:

  • A total of 1633 patients were analyzed; 199 (12.19%) were statin users.
  • Mortality rate was significantly lower in statin users (22.61%) compared to non-users (40%) (P < .0001).
  • No significant differences were observed in reoperation or rehospitalization rates for AA between the groups.

Conclusions:

  • Statin therapy may offer a survival benefit for patients following aortic aneurysm surgery.
  • The findings suggest a potential therapeutic role for statins in managing AA patients postoperatively.
  • Further prospective randomized controlled trials are warranted to definitively establish the efficacy of statin therapy in this patient population.

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