ANTIPSYCHOTIC EXPOSURE AND RISK OF STROKE- A SYSTEMATIC REVIEW AND META-ANALYSIS OF OBSERVATIONAL STUDIES

Author(s)

Hsu W1, Esmaily-Fard A2, Lee C3
1National Taiwan University Hospital, Taipei City, Taiwan, 2The University of Texas MD Anderson Cancer Center, Houston, TX, USA, 3National Taiwan University Hospital, Yunlin Branch, Douliou, Taiwan

BACKGROUND: Use of antipsychotic medications has been associated with increased risk of cerebrovascular events; however, this association remains questionable given conflicting evidence in the literature. OBJECTIVES: We conducted a systematic review and meta-analysis to determine the risk of stroke with the use of antipsychotic medications.  METHODS: All articles published between 1970 and February 2015 were identified by comprehensively searching PubMed, MEDLINE and EMBASE without language restrictions. Observational studies comparing stroke outcomes in antipsychotic patients with non-users were selected. Two authors independently extracted study characteristics and indicators of study quality. Newcastle-Ottawa Scale was adopted to assess risk of bias. Pooled odd ratios (ORs) and heterogeneity (I) were estimated on the basis of random effects models. RESULTS: We identified 22 potentially relevant studies from 1,171 citations. Of these, 9 studies (3 cohort, 5 case–control and 1 case-case-time-control) with a total of 155,789 subjects and 10,203 cases of stroke were eligible for final analysis. Use of antipsychotics was associated with a significantly higher risk of developing stroke [OR 1.57, 95% confidence interval (CI) 1.29-1.98, I= 92.4%]. The pooled OR for stroke was 1.58 [95% CI 1.01-2.49, I = 68.4%] with exposure to conventional antipsychotics and 1.06 [95% CI 0.59-1.89, I = 56.2%] with exposure to atypical antipsychotics. Subgroup analysis of conventional antipsychotics showed elderly patients over 64 years old were at lower risk for stroke [OR 1.37, 95% CI 0.87-2.17, I = 64.5%]. Due to limited data on individual agents, only Risperidone was evaluated in the subgroup analysis of atypical antipsychotics. Risperidone users were less likely to develop stroke than non-users of antipsychotics [OR 0.63, 95% CI 0.33-1.17, I = 55.2%]. CONCLUSIONS: Exposure to conventional antipsychotic was associated with a significant increase in stroke risk. Nonetheless, use of atypical antipsychotics revealed lower risk of stroke. Given heterogeneity among eligible studies, additional research is needed.

Conference/Value in Health Info

2015-09, ISPOR Latin America 2015, Santiago, Chile

Value in Health, Vol. 18, No. 7 (November 2015)

Code

PCV5

Topic

Epidemiology & Public Health

Topic Subcategory

Safety & Pharmacoepidemiology

Disease

Cardiovascular Disorders

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