ArticleEuropean archives of psychiatry and clinical neuroscience2026
Investigating the causal associations between neuroticism, schizophrenia, and cardiovascular diseases using Mendelian randomization.
Article in European archives of psychiatry and clinical neuroscience, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThis study employed two-sample Mendelian randomization (MR) to investigate the potential causal associations between neuroticism, schizophrenia, and various cardiovascular diseases (CVDs), including coronary artery disease (CAD), myocardial infarction (MI), atrial fibrillation (AF), heart failure (HF), stroke, hemorrhagic stroke, and ischemic stroke, along with its subtypes.
methodsWe identified independent genetic variants associated with neuroticism and schizophrenia, along with summary statistics for the instrument-outcome relationship, from the largest available genome-wide association study (GWAS) of European ancestry. The inverse variance-weighted (IVW) method was utilized as the primary analytical approach.
resultsThe IVW analysis indicated that genetically determined neuroticism was associated with an increased risk of small-vessel stroke (SVS: odds ratio [95% confidence interval] = 1.42 [1.19-1.68], P < 0.001) and MI (1.13 [1.03-1.25], P = 0.013). Furthermore, a significant association was observed between schizophrenia and HF (1.13 [1.00-1.06], P = 0.026). These associations remained significant after performing multivariable MR to adjust for sleep duration and body mass index. Specifically, the associations between genetic liability to neuroticism and both SVS and MI were statistically significant, with odds ratios of 1.26 (95% CI 1.02-1.58, P = 0.036) and 1.17 (95% CI 1.05-1.32, P = 0.006), respectively. Furthermore, the associations between schizophrenia and HF remained significant, with an odds ratio of 1.05 (95% CI 1.01-1.09, P = 0.007). These results were consistent across extensive sensitivity analyses.
conclusionOur preliminary genetic evidence suggests that neuroticism may increase the risk of SVS and MI, while schizophrenia may elevate the risk of HF. These findings could inform the identification of patient populations that would benefit from CVD prevention strategies that emphasize mental health improvement.
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