Association Between Cirrhosis and Stroke in a Nationally Representative Cohort

    loading  Checking for direct PDF access through Ovid

Abstract

Importance

Cirrhosis is associated with hemorrhagic and thrombotic extrahepatic complications. The risk of cerebrovascular complications is less well understood.

Objective

To investigate the association between cirrhosis and various stroke types.

Design, Setting, and Participants

We performed a retrospective cohort study using inpatient and outpatient Medicare claims data from January 1, 2008, through December 31, 2014, for a random 5% sample of 1 618 059 Medicare beneficiaries older than 66 years.

Exposures

Cirrhosis, as defined by a validated diagnosis code algorithm.

Main Outcomes and Measures

The primary outcome was stroke, and secondary outcomes were ischemic stroke, intracerebral hemorrhage, and subarachnoid hemorrhage as defined by validated diagnosis code algorithms.

Results

Among 1 618 059 beneficiaries, 15 586 patients (1.0%) had cirrhosis (mean [SD] age, 74.1 [6.9] years; 7263 [46.6%] female). During a mean (SD) of 4.3 (1.9) years of follow-up, 77 268 patients were hospitalized with a stroke. The incidence of stroke was 2.17% (95% CI, 1.99%-2.36%) per year in patients with cirrhosis and 1.11% (95% CI, 1.10%-1.11%) per year in patients without cirrhosis. After adjustment for demographic characteristics and stroke risk factors, patients with cirrhosis had a higher risk of stroke (hazard ratio [HR], 1.4; 95% CI, 1.3-1.5). The magnitude of association appeared to be higher for intracerebral hemorrhage (HR, 1.9; 95% CI, 1.5-2.4) and subarachnoid hemorrhage (HR, 2.4; 95% CI, 1.7-3.5) than for ischemic stroke (HR, 1.3; 95% CI, 1.2-1.5).

Conclusions and Relevance

In a nationally representative sample of Medicare beneficiaries, cirrhosis was associated with an increased risk of stroke, particularly hemorrhagic stroke. A potential explanation of these findings implicates the mixed coagulopathy observed in cirrhosis.

Related Topics

    loading  Loading Related Articles