Kai-Lin Huang1, Han-Ting Wei2, Ju-Wei Hsu1, Ya-Mei Bai1, Tung-Ping Su3, Cheng-Ta Li1, Wei-Chen Lin1, Shih-Jen Tsai1, Wen-Han Chang4, Tzeng-Ji Chen5, Mu-Hong Chen1. 1. Department of Psychiatry,Taipei Veterans General Hospital and Department of Psychiatry,College of Medicine,National Yang-Ming University,Taipei,Taiwan. 2. Department of Psychiatry,College of Medicine,National Yang-Ming University and Linsen Chinese Medicine and Kunming Branch,Taipei City Hospital,Taiwan. 3. Department of Psychiatry,Taipei Veterans General Hospital,Department of Psychiatry,College of Medicine,National Yang-Ming University and Department of Psychiatry,General Cheng Hsin Hospital,Taipei,Taiwan. 4. Department of Psychiatry,Taipei Veterans General Hospital,Taipei,Taiwan. 5. Department of Family Medicine,Taipei Veterans General Hospital and Institute of Hospital and Health Care Administration,National Yang-Ming University,Taipei,Taiwan.
Abstract
BACKGROUND: Attention-deficit hyperactivity disorder (ADHD) increases the risk of suicidal behaviours through psychiatric comorbidities; however, a significant direct association has not been observed between ADHD and suicide attempts. Aims To evaluate the risk of suicide attempt in adolescents and young adults with ADHD. METHOD: Using a nationwide, population-based insurance claims database, this longitudinal cohort study enrolled 20 574 adolescents and young adults with ADHD and 61 722 age- and gender-matched controls between 2001 and 2009. Any suicide attempt was identified from enrolment to 31 December 2011. The association between ADHD medications and the likelihood of suicide attempt was assessed. RESULTS: ADHD was an independent risk factor for any suicide attempt (hazard ratio = 3.84, 95% CI = 3.19-4.62) and repeated suicide attempts (hazard ratio = 6.52, 95% CI = 4.46-9.53). Subgroup analyses of men, women, adolescents and young adults demonstrated the same trend. Methylphenidate or atomoxetine treatment did not increase the risk of suicide attempt or repeated suicide attempts. Long-term methylphenidate treatment was associated with a significantly decreased risk of repeated suicide attempts in men (hazard ratio = 0.46, 95% CI = 0.22-0.97). CONCLUSION: ADHD was a risk factor for suicide attempt and a stronger predictor of repeated suicide attempts, independent of comorbidities. Further investigation is warranted to explore the mechanism underlying the association between ADHD and suicidal behaviours. Declaration of interest None.
BACKGROUND:Attention-deficit hyperactivity disorder (ADHD) increases the risk of suicidal behaviours through psychiatric comorbidities; however, a significant direct association has not been observed between ADHD and suicide attempts. Aims To evaluate the risk of suicide attempt in adolescents and young adults with ADHD. METHOD: Using a nationwide, population-based insurance claims database, this longitudinal cohort study enrolled 20 574 adolescents and young adults with ADHD and 61 722 age- and gender-matched controls between 2001 and 2009. Any suicide attempt was identified from enrolment to 31 December 2011. The association between ADHD medications and the likelihood of suicide attempt was assessed. RESULTS:ADHD was an independent risk factor for any suicide attempt (hazard ratio = 3.84, 95% CI = 3.19-4.62) and repeated suicide attempts (hazard ratio = 6.52, 95% CI = 4.46-9.53). Subgroup analyses of men, women, adolescents and young adults demonstrated the same trend. Methylphenidate or atomoxetine treatment did not increase the risk of suicide attempt or repeated suicide attempts. Long-term methylphenidate treatment was associated with a significantly decreased risk of repeated suicide attempts in men (hazard ratio = 0.46, 95% CI = 0.22-0.97). CONCLUSION:ADHD was a risk factor for suicide attempt and a stronger predictor of repeated suicide attempts, independent of comorbidities. Further investigation is warranted to explore the mechanism underlying the association between ADHD and suicidal behaviours. Declaration of interest None.
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