Suicidal Ideation, Suicide Planning, and Suicide Attempts Among Adolescents in 59 Low-income and Middle-income Countries: a Population-based Study

Background: Suicide is a major global health challenge and a leading cause of death among adolescents, but research related to suicide has concentrated on high-income countries. We aimed to estimate the prevalence of suicidal ideation, suicide planning, and suicide attempts in adolescents from 59 low-income and middle-income countries.

Methods: In this population-based study, we used data from the Global School-based Student Health Survey of schoolchildren aged 13-17 years between 2003 and 2015, in 59 low-income and middle-income countries across six WHO regions. Using a meta-analysis with random effects, we computed the sex-based and age-based estimates of regional and overall prevalence of suicidal ideation, suicide planning, and suicide attempts.

Findings: Our sample consisted of 229 129 adolescents (mean age 14·6 [SD 1·18] years; 111 082 [48%] boys and 118 047 [52%] girls). The overall prevalence of suicidal ideation was 16·9% (95% CI 15·0-18·8), suicide planning was 17·0% (14·8-19·2), and suicide attempts was 17·0% (14·7-19·3) in the 12 months preceding survey completion. The African region had the highest prevalence of suicidal ideation (20·4%, 17·3-23·6) and suicide planning (23·7%, 19·1-28·3), and the western Pacific region had the highest prevalence of suicide attempts (20·5%, 14·3-26·7). Southeast Asia had the lowest prevalence of ideation (8·0%, 4·5-11·5), planning (9·9%, 5·0-14·8), and attempts (9·2%, 5·1-13·3). Girls had higher prevalence than boys for suicidal ideation (18·5%, 16·4-20·6 vs 15·1%, 13·4-16·7), suicide planning (18·2%, 15·8-20·6 vs 15·6%, 13·7-17·6), and suicide attempts (17·4%, 15·0-19·8 vs 16·3%, 14·0-18·6). Adolescents aged 15-17 years had higher prevalence than those aged 13-14 years of suicidal ideation (17·8%, 15·8-19·8 vs 15·9%, 14·1-17·6), suicide planning (17·8%, 15·7-20·0 vs 16·3%, 14·7-17·9), and suicide attempts (17·6%, 15·2-20·0 vs 16·2%, 13·8-18·5).

Interpretation: Suicidal thoughts and behaviours are prevalent among adolescents in low-income and middle-income countries, particularly in the African and the western Pacific regions, and particularly among girls and adolescents aged 15-17 years. Targeted suicide prevention initiatives are needed and should take into account the diverse range of cultural and socioeconomic backgrounds of the countries.

Funding: None.