Three Suicide Risk Subtypes Identified in Adolescents with Major Depression

Researchers analyzing data from 930 first-episode, treatment-naive adolescents with major depressive disorder (MDD) aged 12 to 18 years have identified three distinct subtypes of suicide risk, revealing a hidden group of young people whose depressive burden and suicide vulnerability indicators resemble those of overtly high-risk peers but who disclose far less about suicidal thoughts. The cross-sectional study, published in BMC Health Services Research, combined latent profile analysis with network analysis of questionnaire items to map how suicide risk is structured within this population.

The three subtypes differed markedly in size and character. A low suicide risk group comprised 248 participants, or 26.7 percent of the sample. The largest single category was a low-disclosure, high suicide vulnerability group, containing 329 adolescents, or 35.4 percent. The overt, high suicide risk group numbered 353 participants, or 38.0 percent.

Between-group comparisons showed significant differences in total SBQ-R and ASLEC scores, the latter drawn from the Adolescent Self-Rating Life Events Checklist. Total scores on the Patient Health Questionnaire-9 (PHQ-9) were significantly lower in the low suicide risk group than in the other two groups, which did not differ from each other. This pattern is central to the study’s most striking finding: the low-disclosure, high-suicide-vulnerability group carried a depressive symptom burden and partial suicide risk indicators comparable to those of the overt, high-suicide-risk group, yet demonstrated lower active disclosure of suicide-related information.

To examine how individual scale items related to one another within each subtype, the researchers constructed regularized partial correlation networks using PHQ-9 items, SBQ-R items, and dimensions of the ASLEC.

In the low suicide risk group, the items with the highest strength centrality were PHQ-9 Item 1, reflecting loss of interest, ASLEC dimension I, covering punishment, and PHQ-9 Item 2, depressed mood. In the low-disclosure, high-suicide-vulnerability group, PHQ-9 Item 2, ASLEC dimension III, concerning interpersonal relationships, and PHQ-9 Item 1 showed elevated node strength. In the overt high suicide risk group, ASLEC dimensions I and III and PHQ-9 Item 4, which captures fatigue and loss of energy, had the strongest node connections.

Network comparison tests revealed that global strength did not differ significantly in any pairwise contrast between subtypes, indicating that the overall density of item associations was similar across groups. Significant structural divergence emerged only between the low suicide risk group and the overt high suicide risk group. SBQ-R Item 4, which asks about the future likelihood of suicide, was the only differentially weighted node. The authors caution that because this item contributed to the derivation of the latent profiles themselves, this node-level difference is subject to partial mechanical circularity and must be interpreted cautiously.

The study’s conclusions emphasize both the heterogeneity of suicide risk among adolescents with MDD and the limits of the network approach. The authors state that network structures showed considerable overlap across subtypes, with only limited item-level correlational discrepancies. They further stress that centrality metrics merely reflect correlational patterns among scale items rather than causal relationships or definitive intervention targets, a caveat that tempers any temptation to read the identified hub items as direct levers for treatment.

As a cross-sectional design, the study captures associations at a single point in time and cannot establish temporal sequences or causal pathways. The sample consisted exclusively of first-episode, treatment-naive adolescents with MDD aged 12 to 18, so findings may not generalize to young people with recurrent depression, those already in treatment, or adolescents without a depressive disorder diagnosis. The authors explicitly note that the findings warrant validation through longitudinal research.

Nevertheless, the identification of a low-disclosure subtype with substantial depressive burden and suicide vulnerability indicators carries practical implications for stratified risk screening. The study was prospectively registered in the Chinese Clinical Trial Registry under registration number ChiCTR2400088411, with registration dated August 19, 2024. The authors position the work as evidence for optimizing stratified suicide risk screening and as a foundation for future longitudinal intervention research, rather than as a basis for immediate clinical change.

Subject of Research: Latent suicide risk subtypes and item-level association networks among adolescents with major depressive disorder

Article Title: Three latent subtypes of suicide risk and network characteristics of scale item associations among adolescents with major depressive disorder: a cross-sectional study

Article References: Liu, M., He, X., Mo, P., Luo, W., & Luo, J. (2026). Three latent subtypes of suicide risk and network characteristics of scale item associations among adolescents with major depressive disorder: a cross-sectional study. BMC Health Services Research. https://doi.org/10.1186/s12913-026-15512-z

Image Credits: AI Generated

DOI: 10.1186/s12913-026-15512-z

Keywords: suicide risk, adolescents, major depressive disorder, latent profile analysis, network analysis, SBQ-R, PHQ-9, cross-sectional study, risk screening, mental health, Three, latent