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Background <p>Research suggests that lipid levels may be associated with suicide risk. However, the specific relationship between Apolipoprotein B and suicidal ideation remains unclear. The aim of this study was to investigate the association between ApoB levels and suicidal ideation and to further explore the causal relationship using Mendelian randomization.</p> Methods <p>A cross-sectional study of 6520 U.S. adults was conducted using the 2011–2016 National Health and Nutrition Examination Survey (NHANES) dataset. Multiple logistic regression, smoothed curve fitting, stratified analyses, and interaction tests were used to reveal the relationship between ApoB levels and suicidal ideation. MR analyses were conducted using inverse variance weighting (IVW), GSMR, Maximum likelihood method, and cML-MA-BIC MR method. Sensitivity analyses included MR-Egger intercept test, MR-PRESSO global test, and leave-one-out (LOO) analysis.</p> Results <p>Multivariate logistic regression analysis showed that serum ApoB levels were positively associated with suicidal ideation, and the association remained significant even after multiple covariates (<i>P</i> = 0.0463). Subgroup analyses showed that the risk of suicidal ideation was significantly increased in the highest tertile (T3) of the population compared to the lowest tertile (T1) of ApoB levels (OR = 1.48, 95% CI: 1.04–2.12, <i>P</i> = 0.0312). In addition, the association between ApoB and suicidal ideation was more significant in the smoking subgroup (P interaction = 0.034). However, MR analysis failed to confirm a significant causal effect of ApoB levels on suicidal ideation (<i>P</i> &gt; 0.05), and these results were robust to sensitivity analyses.</p> Conclusion <p>The present study found a significant positive association between serum ApoB levels and suicidal ideation, especially among smokers. MR analysis failed to provide causal evidence of ApoB on suicidal ideation. More research is needed to clarify the potential role of ApoB in the development of suicidal ideation.</p>

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Association between Apolipoprotein B (ApoB) and suicidal ideation: a cross-sectional study and Mendelian randomization analysis

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月27日

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  • Mixue Guo,
  • Haifeng Zhang,
  • Chang Fu,
  • Hongli Wan,
  • Xintian Cai,
  • Huqiang Dong,
  • Hongping Cheng

摘要

Background

Research suggests that lipid levels may be associated with suicide risk. However, the specific relationship between Apolipoprotein B and suicidal ideation remains unclear. The aim of this study was to investigate the association between ApoB levels and suicidal ideation and to further explore the causal relationship using Mendelian randomization.

Methods

A cross-sectional study of 6520 U.S. adults was conducted using the 2011–2016 National Health and Nutrition Examination Survey (NHANES) dataset. Multiple logistic regression, smoothed curve fitting, stratified analyses, and interaction tests were used to reveal the relationship between ApoB levels and suicidal ideation. MR analyses were conducted using inverse variance weighting (IVW), GSMR, Maximum likelihood method, and cML-MA-BIC MR method. Sensitivity analyses included MR-Egger intercept test, MR-PRESSO global test, and leave-one-out (LOO) analysis.

Results

Multivariate logistic regression analysis showed that serum ApoB levels were positively associated with suicidal ideation, and the association remained significant even after multiple covariates (P = 0.0463). Subgroup analyses showed that the risk of suicidal ideation was significantly increased in the highest tertile (T3) of the population compared to the lowest tertile (T1) of ApoB levels (OR = 1.48, 95% CI: 1.04–2.12, P = 0.0312). In addition, the association between ApoB and suicidal ideation was more significant in the smoking subgroup (P interaction = 0.034). However, MR analysis failed to confirm a significant causal effect of ApoB levels on suicidal ideation (P > 0.05), and these results were robust to sensitivity analyses.

Conclusion

The present study found a significant positive association between serum ApoB levels and suicidal ideation, especially among smokers. MR analysis failed to provide causal evidence of ApoB on suicidal ideation. More research is needed to clarify the potential role of ApoB in the development of suicidal ideation.