Sleep and suicidality in school-aged adolescents: A prospective study with 2-year follow-up

Current evidence about the association between sleep and suicide are conflicting. This study aimed to investigate the association between sleep duration and quality with suicidal behaviors in a group of school-aged adolescents in China. The baseline survey was conducted among Chinese adolescents aged 12-13 years in October 2016. All participants were asked to complete a self-administered questionnaire. After 2 years follow-up, a total of 1513 adolescents completed the follow-up. The multivariable logistic regression analysis showed that shorter sleep duration ( < 8 h per night) in baseline was associated with an increased likelihood of suicidally in boys [suicidal ideation, adjusted odds ratio (OR) = 2.18, 95% confidence interval (CI) =1.97 to 3.98; suicide planning, OR = 2.47, 95% CI =1.22 to 5.01; suicide attempt, OR= 2.97, 95% CI =1.39 to 6.38]. Similarly, poor sleep quality [Pittsburgh Sleep Quality Index (PSQI) >= 5] was associated with an increased likelihood of suicidal ideation and suicide planning in boys (OR= 2.14, 95% CI =1.15 to 3.99 and OR = 2.47, 95% CI =1.16 to 5.25, respectively). This study indicates that school-aged boys are more likely to experience suicidally in exposure to short sleep or poor sleep quality.