Dataset Information

Continuation versus discontinuation of aspirin-based antiplatelet therapy for perioperative bleeding and ischaemic events in adults undergoing neurosurgery: protocol for a systematic review and meta-analysis.

ABSTRACT:

Introduction

Antiplatelet therapy is commonly used in primary or secondary prevention of atherosclerotic and thrombotic diseases, such as coronary artery disease, transient ischaemic attack or stroke. Recent studies noted that antiplatelet therapy should be continued perioperatively in patients at high risk of thrombosis and low bleeding risk in orthopaedic, spinal or urological surgery. However, evidence in neurosurgery is lacking. Thus, we aim to conduct a systematic review and meta-analysis to assess whether the continuous use of antiplatelet drugs in neurosurgery increases the risk of perioperative bleeding.

Methods and analysis

We will search PubMed, Cochrane Central Register of Controlled Trials and Embase using a strategy that combines the terms aspirin, bleeding/ischaemic and neurosurgery. Two reviewers will independently screen all identified abstracts for eligibility and evaluate the risk of bias of the included studies using the Cochrane risk of bias tool for randomised controlled studies and the Newcastle-Ottawa Scale for observational studies (including cohort studies, case-control studies, case series). Discrepancies will be resolved by consultation with a third researcher. We will conduct a systematic review and meta-analysis. If evidence suggests moderate statistical or clinical heterogeneity, we plan to investigate this heterogeneity by performing subgroup analyses and sensitivity analysis.

Ethics and dissemination

No ethics approval will be sought as no original data will be collected for this review. Findings will be disseminated through peer-reviewed publication and conference presentations.

Prospero registration number

CRD42020202590.

SUBMITTER: Wang X

PROVIDER: S-EPMC8487199 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:ImportanceThe role for aspirin in cardiovascular primary prevention remains controversial, with potential benefits limited by an increased bleeding risk.ObjectiveTo assess the association of aspirin use for primary prevention with cardiovascular events and bleeding.Data sourcesPubMed and Embase were searched on Cochrane Library Central Register of Controlled Trials from the earliest available date through November 1, 2018.Study selectionRandomized clinical trials enrolling at least 1000 participants with no known cardiovascular disease and a follow-up of at least 12 months were included. Included studies compared aspirin use with no aspirin (placebo or no treatment).Data extraction and synthesisData were screened and extracted independently by both investigators. Bayesian and frequentist meta-analyses were performed.Main outcomes and measuresThe primary cardiovascular outcome was a composite of cardiovascular mortality, nonfatal myocardial infarction, and nonfatal stroke. The primary bleeding outcome was any major bleeding (defined by the individual studies).ResultsA total of 13 trials randomizing 164 225 participants with 1 050 511 participant-years of follow-up were included. The median age of trial participants was 62 years (range, 53-74), 77 501 (47%) were men, 30 361 (19%) had diabetes, and the median baseline risk of the primary cardiovascular outcome was 9.2% (range, 2.6%-15.9%). Aspirin use was associated with significant reductions in the composite cardiovascular outcome compared with no aspirin (57.1 per 10 000 participant-years with aspirin and 61.4 per 10 000 participant-years with no aspirin) (hazard ratio [HR], 0.89 [95% credible interval, 0.84-0.95]; absolute risk reduction, 0.38% [95% CI, 0.20%-0.55%]; number needed to treat, 265). Aspirin use was associated with an increased risk of major bleeding events compared with no aspirin (23.1 per 10 000 participant-years with aspirin and 16.4 per 10 000 participant-years with no aspirin) (HR, 1.43 [95% credible interval, 1.30-1.56]; absolute risk increase, 0.47% [95% CI, 0.34%-0.62%]; number needed to harm, 210).Conclusions and relevanceThe use of aspirin in individuals without cardiovascular disease was associated with a lower risk of cardiovascular events and an increased risk of major bleeding. This information may inform discussions with patients about aspirin for primary prevention of cardiovascular events and bleeding.