2026
Conference PaperAccepted2026
Cross-Cultural Early Detection of Suicidal Ideation in Adolescents: An Ensemble Machine Learning Approach Using GSHS Data
Adil Mahmoud Rion, Md Mursalatul Islam Pallob, Rasheduzzaman Rakib, Md Asraful Molla, Mehedi Hasan
TENCON 2026 — 2026 IEEE Region 10 Conference (TENCON) · IEEE
#machine-learning#suicidal-ideation#ensemble-learning#gshs#public-health#smote
Suicide among adolescents is an escalating worldwide public health problem costing more than 800,000 lives every year and affecting low and middle-income countries (LMICs) disproportionately, where mental health resources are often limited. Conventional clinical screenings are time consuming and can be error-prone. We propose an innovative machine learning framework with privacy-preserving algorithms based on standardized Global School Based Student Health Survey data from 4 LMICs (Bangladesh 2014, Nepal 2015, Thailand 2015, Timor-Leste 2015) (total 19116). Suicidal behaviors (ideation, planning and attempts) was combined into a binary risk indicator. K-Nearest Neighbors imputer was used for handling the missing data followed by Synthetic Minority Over-Sampling Technique (SMOTE) for addressing the problem of class imbalance. This is for the seven models which were evaluated, and Extra Trees had the best overall performance with 98.04% accuracy on the Bangladeshi cohort and with good generalizability across the multi-country pooled dataset (accuracy 92.89%, F1 0.928, AUC 0.977). Through feature analysis, five highly stable features were identified: lack of close friendships, bullying, loneliness, sleep disturbance, and early sexual activity. This framework offers an ethical and evidence-based approach to risk screening for adolescents below age 16 experiencing suicidal ideation and/or suicidal behaviors in resource-poor communities.