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Neutrophil-to-lymphocyte ratio: A potential new peripheral biomarker of suicidal behavior

  • Ángela Velasco (a1) (a2) (a3), Julia Rodríguez-Revuelta (a1) (a3) (a4), Emilie Olié (a5) (a6), Iciar Abad (a4), Abel Fernández-Peláez (a1), Aurélie Cazals (a5) (a6), Sébastien Guillaume (a5) (a6), Lorena de la Fuente-Tomás (a1) (a2) (a3), Luis Jiménez-Treviño (a1) (a2) (a3) (a4), Laura Gutiérrez (a3) (a7), Paz García-Portilla (a1) (a2) (a3) (a4), Julio Bobes (a1) (a2) (a3) (a4), Philippe Courtet (a5) (a6) and Pilar A. Sáiz (a1) (a2) (a3) (a4)...

Abstract

Background.

Neutrophil-to-lymphocyte ratio (NLR), monocyte-to-lymphocyte ratio (MLR), and platelet-to-lymphocyte ratio (PLR) have emerged as important peripheral inflammatory biomarkers. Recent data suggest a possible role of the immune system in the pathophysiology of suicidal behavior (SB). The aim of this study is to evaluate the association among NLR, MLR, and PLR and SB in patients with major depressive disorder (MDD), and to test its validity as a biomarker for suicidality.

Methods.

We evaluated 538 patients with MDD (mean age [standard deviation] = 43.87 [14.36] years; females: 68.8%). A logistic regression model was estimated to determine the independent factors associated with suicide risk in patients with and without a history of suicide attempt (SA).

Results.

Three hundred ninety-three patients (74.7%) had a personal history of SA. Patients with a previous SA were more frequently female (71.9% vs. 59.6%; p = 0.007), significantly younger (41.20 vs. 51.77 years; p < 0.001), had lower depression severity at enrolment (15.58 vs. 18.42; p < 0.000), and significantly higher mean NLR and PLR ratios (2.27 vs. 1.68, p = 0.001; 127.90 vs. 109.97, p = 0.007, respectively). In the final logistic regression model, after controlling for age, sex, and depression severity, NLR was significantly associated with SB (β = 0.489, p = 0.000; odds ratio [95% confidence intervals] = 1.631 [1.266–2.102]). We propose a cut-off value of NLR = 1.30 (sensitivity = 75% and specificity = 35%).

Conclusions.

Our data suggest that NLR may be a valuable, reproducible, easily accessible, and cost-effective strategy to determine suicide risk in MDD.

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Copyright

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

Corresponding author

Ángela Velasco Iglesias, E-mail: angelaig@outlook.com

References

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Keywords

Neutrophil-to-lymphocyte ratio: A potential new peripheral biomarker of suicidal behavior

  • Ángela Velasco (a1) (a2) (a3), Julia Rodríguez-Revuelta (a1) (a3) (a4), Emilie Olié (a5) (a6), Iciar Abad (a4), Abel Fernández-Peláez (a1), Aurélie Cazals (a5) (a6), Sébastien Guillaume (a5) (a6), Lorena de la Fuente-Tomás (a1) (a2) (a3), Luis Jiménez-Treviño (a1) (a2) (a3) (a4), Laura Gutiérrez (a3) (a7), Paz García-Portilla (a1) (a2) (a3) (a4), Julio Bobes (a1) (a2) (a3) (a4), Philippe Courtet (a5) (a6) and Pilar A. Sáiz (a1) (a2) (a3) (a4)...

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Neutrophil-to-lymphocyte ratio: A potential new peripheral biomarker of suicidal behavior

  • Ángela Velasco (a1) (a2) (a3), Julia Rodríguez-Revuelta (a1) (a3) (a4), Emilie Olié (a5) (a6), Iciar Abad (a4), Abel Fernández-Peláez (a1), Aurélie Cazals (a5) (a6), Sébastien Guillaume (a5) (a6), Lorena de la Fuente-Tomás (a1) (a2) (a3), Luis Jiménez-Treviño (a1) (a2) (a3) (a4), Laura Gutiérrez (a3) (a7), Paz García-Portilla (a1) (a2) (a3) (a4), Julio Bobes (a1) (a2) (a3) (a4), Philippe Courtet (a5) (a6) and Pilar A. Sáiz (a1) (a2) (a3) (a4)...
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