The roles of suicide-related rumination and COVID-19 in suicidal ideation and behaviours: Data from a large-scale youth epidemiological sample in Hong Kong

ABSTRACT

Suicide remains to be one of the leading causes of death amongst young people worldwide. Help-seeking, however, remains disproportionately suboptimal in the youth population. Identifying more effective and less stigmatizing markers of suicidal ideation and behaviours can be important for improving early engagement and intervention work. We therefore examined the prevalence of suicidal ideation, plan, and attempt in a large epidemiological youth sample in Hong Kong (n = 2540) during the period of 2019-2021, as well as the factors associated with each of these outcomes using separate multivariable logistic regression models. In this sample, the 12-month prevalence of suicidal ideation, plan, and attempt was 20.0%, 4.6%, and 1.3%, respectively. In particular, we found 'suicide-related rumination' to be amongst the only factor that was significant for all three outcomes (p < .010). Using a two-stage approach (i.e., selecting only those with suicidal ideation), we found that suicide-related rumination, poorer cognitive ability, and 12-month major depressive episode were specifically associated with 12-month suicide plan, while environmental factors, including COVID-19 stressors, personal life stressors, poorer family relationships, as well as non-suicidal selfharm, were specifically associated with 12-month suicide attempt. A two-stage approach should be considered in future interventions targeting youth suicide. Suicide-related rumination may be an important marker of overall suicidal risk. The role of environmental stressors in addition to intrinsic vulnerability also need to be emphasized to best support young people at risk.