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Defining suicidality phenotypes for genetic studies: perspectives of the Psychiatric Genomics Consortium Suicide Working Group
Journal article   Open access   Peer reviewed

Defining suicidality phenotypes for genetic studies: perspectives of the Psychiatric Genomics Consortium Suicide Working Group

Sarah M C Colbert, Eric T Monson, Ole A Andreassen, Olatunde O Ayinde, Peter B Barr, Cosmin A Bejan, Zuriel Ceja, Hilary Coon, Emily DiBlasi, Howard J Edenberg, …
Molecular psychiatry, Vol.30(12), pp.6144-6154
12/2025
DOI: 10.1038/s41380-025-03271-y
PMCID: PMC12602352
PMID: 40999039
url
https://doi.org/10.1038/s41380-025-03271-yView
Published (Version of record) Open Access

Abstract

Suicidality phenotypes, consisting of suicidal ideation (SI), suicide attempt (SA), and suicide death (SD), are all heritable but present unique challenges in genome-wide association studies (GWAS) due to their individual complexity, overlap with each other and with related self-harm phenotypes, and varying associations with psychiatric disorders. GWAS have uncovered several loci associated with suicidality phenotypes by meta-analyzing data from multiple cohorts. However, combining datasets from many research groups, where each group may use different study designs, phenotyping instruments, and definitions of suicidality phenotypes, presents challenges. Heterogeneity resulting from these differences can limit genetic discovery; harmonizing phenotype definitions to ensure consistency will greatly improve results. Here, we describe a standardized phenotyping protocol that draws on the expertise of a subgroup of clinicians, researchers, and experts from the Psychiatric Genomics Consortium Suicide Working Group to propose consensus definitions for SI, SA, and SD for genetic studies.

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