COVID-19 and risk of self-harm, suicidal ideation, and poisoning in children and adolescents

This study examined the association between COVID-19 and the risk of self-harm, suicidal ideation and poisoning in school-aged children and adolescents. We utilized the 2019–2021 Utah All Payers Claims Database (APCD) to identify school-age children and adolescents aged 6–15 years in 2019. COVID-19 diagnosis, self-harm, suicidal ideation and poisoning were identified using ICD-10 diagnosis codes. Baseline characteristics were assessed, and Inverse Probability Weighting (IPW) was applied to balance these characteristics between the two groups (those with COVID-19 and those without). Weighted logistic regression was employed to identify factors associated with these outcomes in 2021. The study included 180,925 participants (48% female; mean [SD] age in 2019: 10.6 [2.9] years), of whom 45,056 (24.9%) had a COVID-19 in 2020, and 51.5% were aged 11–15 years. Subjects with COVID-19 had twice the odds of suicidal ideation (AOR = 2.00, <i>p</i> &lt; 0.01) and more than twice the odds of self-harm (AOR = 2.05, <i>p</i> &lt; 0.01) and poisoning (AOR = 2.21, <i>p</i> &lt; 0.01) compared to those without COVID-19. Adolescents aged 11–15 years had nearly four times the odds of suicidal ideation compared to those aged 6–10 years (AOR = 3.97, <i>p</i> &lt; 0.01) while female participants were significantly more likely to engage in self-harm than male participants (AOR = 1.73, <i>p</i> &lt; 0.01). Our findings suggest a significant association between diagnosed COVID-19 and self-harming behaviours in children and adolescents.