The association of monthly, diurnal and circadian variations with suicide attempts by young people

Greydanus DE, Calles JJ. Suicide in children and adolescents. Prim Care. 2007;34:259–73. Schmidtke A, Bille-Brahe U, DeLeo D, Kerkhof A, Bjerke T, Crepet P, et al. Attempted suicide in Europe: rates, trends and sociodemographic characteristics of suicide attempters during the period 1989–1992. Results of the WHO/EURO Multicentre Study on Parasuicide. Acta Psychiatr Scand. 1996;93:327–38. World Health Organisation: Child and adolescent mental health. http://www.who.int/mental_health/women_children/child_adolescent/en/index.html. 2014. Accessed 15 May 2015. Blum RW, Nelson-Mmari K. The health of young people in a global context. J Adolesc Health. 2004;35:402–18. Mittendorfer-Rutz E, Rasmussen F, Wasserman D. Restricted fetal growth and adverse maternal psychosocial and socioeconomic conditions as risk factors for suicidal behaviour of offspring: a cohort study. Lancet. 2004;364:1135–40. Varnik A, Kolves K, Allik J, Arensman E, Aromaa E, van Audenhove C, et al. Gender issues in suicide rates, trends and methods among youths aged 15–24 in 15 European countries. J Affect Disord. 2009;113:216–26. Wasserman D, Cheng Q, Jiang G. Global suicide rates among young people aged 15–19. World Psychiatry. 2005;4:114–20. Doganay Z, Sunter AT, Guz H, Ozkan A, Altintop L, Kati C, et al. Climatic and diurnal variation in suicide attempts in the ED. Am J Emerg Med. 2003;21:271–5. Lewinsohn PM, Rohde P, Seeley JR, Baldwin CL. Gender differences in suicide attempts from adolescence to young adulthood. J Am Acad Child Adolesc Psychiatry. 2001;40:427–34. Nock MK, Borges G, Bromet EJ, Cha CB, Kessler RC, Lee S. Suicide and suicidal behavior. Epidemiol Rev. 2008;30:133–54. American Foundation for Suicide Prevention 2015 Facts and figures. https://www.afsp.org/understanding-suicide/facts-and-figures. Accessed 10 Oct 2015. Akkaya-Kalayci T, Popow C, Waldhor T, Ozlu-Erkilic Z. Impact of religious feast days on youth suicide attempts in Istanbul, Turkey. Neuropsychiatrie. 2015;29:120–4. Akkaya-Kalayci T, Popow C, Winkler D, Bingol RH, Demir T, Ozlu Z. The impact of migration and culture on suicide attempts of children and adolescents living in Istanbul. Int J Psychiatry Clin Pract. 2015;19:32–9. Skala K, Bruckner T. Beating the odds: an approach to the topic of resilience in children and adolescents. Neuropsychiatrie. 2014;28:208–17. Beauchamp GA, Ho ML, Yin S. Variation in suicide occurrence by day and during major American holidays. J Emerg Med. 2014;46:776–81. Polewka A, Kroch S, Chrostek Maj J. Suicidal behavior and suicide attempts in adolescents and young adults—epidemiology, risk factors, prevention and treatment. J. Przegl Lek. 2004;61:261–4. Valtonen H, Suominen K, Partonen T, Ostamo A, Lonnqvist J. Time patterns of attempted suicide. J Affect Disord. 2006;90:201–7. Modan B, Nissenkorn I, Lewkowski SR. Suicide in a heterogeneous society. Br J Psychiatry. 1970;116:65–8. Corcoran P, Reilly M, Salim A, Brennan A, Keeley HS, Perry IJ. Temporal variation in Irish suicide rates. Suicide Life Threat Behav. 2004;34:429–38. Law CK, Leung CM. Temporal patterns of charcoal burning suicides among the working age population in Hong Kong SAR: the influence of economic activity status and sex. BMC Public Health. 2012;12:505. Caracciolo S, Manfredini R, Gallerani M, Tugnoli S. Circadian rhythm of parasuicide in relation to violence of method and concomitant mental disorder. Acta Psychiatr Scand. 1996;93:252–6. Pandit A. Circadian rhythm variation in attempted suicide by deliberate self-poisoning, and in completed suicide, in Central Nepal. Biol Rhythm Res. 2004;35:229–33. Lukaschek K, Baumert J, Erazo N, Ladwig KH. Stable time patterns of railway suicides in Germany: comparative analysis of 7,187 cases across two observation periods (1995–1998; 2005–2008). BMC Public Health. 2014;14:124. Preti A, Miotto P. Diurnal variations in suicide by age and gender in Italy. J Affect Disord. 2001;65:253–61. van Houwelingen CA, Beersma DG. Seasonal changes in 24-h patterns of suicide rates: a study on train suicides in The Netherlands. J Affect Disord. 2001;66:215–23. Deveci A, Taskin EO, Erbay Dundar P, Demet MM, Kaya E, Ozmen E, et al. The prevalence of suicide ideation and suicide attempts in Manisa City Centre. Turk Psikiyatri Derg. 2005;16:170–8. Lee MT, Wong BP, Chow BW, McBride-Chang C. Predictors of suicide ideation and depression in Hong Kong adolescents: perceptions of academic and family climates. Suicide Life Threat Behav. 2006;36:82–96. Yalaki Z, Tasar MA, Yalcin N, Dallar Y. Cocuk ve genclik dönemindeki özkiyim girisimlerinin degerlendirilmesi. Ege Tip Dersigisi. 2011;50:125–8. Jessen G, Jensen BF, Arensman E, Bille-Brahe U, Crepet P, De Leo D, et al. Attempted suicide and major public holidays in Europe: findings from the WHO/EURO multicentre study on parasuicide. Acta Psychiatr Scand. 1999;99:412–8. Jessen G, Andersen K, Arensman E, Bille-Brahe U, Crepet P, De Leo D, et al. Temporal fluctuations and seasonality in attempted suicide in Europe. Findings from the WHO/EURO multicentre study on parasuicide. Archiv Suicide Res. 1999;5:57–9. Nishi M, Miyake H, Okamoto H, Goto Y, Sakai T. Relationship between suicide and holidays. Epidemiology. 2000;10:317–20. Dervic K, Akkaya-Kalayci T, Kapusta ND, Kaya M, Merl E, Vogel E, et al. Suicidal ideation among Viennese high school students. Wien Klin Wochenschr. 2007;119:174–80. Dervic K, Gould MS, Lenz G, Kleinman M, Akkaya-Kalayci T, Velting D, et al. Youth suicide risk factors and attitudes in New York and Vienna: a cross-cultural comparison. Suicide Life Threat Behav. 2006;36:539–52. Ranney ML, Patena JV, Nugent N, Spirito A, Boyer E, Zatzick D, et al. PTSD, cyberbullying and peer violence: prevalence and correlates among adolescent emergency department patients. Gen Hosp Psychiatry. 2016;39:32–8. Gabennesch H. When promises fail: a theory of temporal fluctuations in suicide. Soc Forces. 1988;67:129–45. Erazo N, Baumert J, Ladwig KH. Sex-specific time patterns of suicidal acts on the German railway system. An analysis of 4003 cases. J Affect Disord. 2004;83:1–9. Mergl R, Havers I, Althaus D, Rihmer Z, Schmidtke A, Lehfeld H, et al. Seasonality of suicide attempts: association with gender. Eur Arch Psychiatry Clin Neurosci. 2010;260:393–400. Rocchi MB, Sisti D, Cascio MT, Preti A. Seasonality and suicide in Italy: amplitude is positively related to suicide rates. J Affect Disord. 2007;100:129–36. Polewka A, Szkolnicka B, Targosz D, Groszek B, Kroch S, Chrostek Maj J, et al. Fluctuations and seasonality in suicidal attempts. Przegl Lek. 2004;61:269–73. ÖSYM 2010 Öğrenci Seçme ve Yerleştirme Merkezi. 2010 Yılı Sınav Takvimi. http://www.osym.gov.tr/belge/1-12296/2010-sinav-takvimi.html. Accessed 10 Feb 2009. Cam B. Suicide attempt, sociodemographic characteristics, and seasonality. Klinik Psikofarmakoloji Bülteni. 2012;22:158. Elisei S, Verdolini N, Anastasi S. Suicidal attempts among Emergency Department patients: one-year of clinical experience. Psychiatr Danub. 2012;24(Suppl 1):S140–2. Monnin J, Thiemard E, Vandel P, Nicolier M, Tio G, Courtet P, et al. Sociodemographic and psychopathological risk factors in repeated suicide attempts: gender differences in a prospective study. J Affect Disord. 2012;136:35–43. Naidoo SS, Schlebusch L. Sociodemographic and clinical profiles of suicidal patients requiring admission to hospitals south of Durban. S Afr Fam Pract. 2013;55:373–9. Rancic N, Ignjatovic Ristic D, Radovanovic S, Kocic S, Radevic S. Sociodemographic and clinical characteristics of hospitalized patients after suicide attempt: a twenty-year retrospective study. Med Glas (Zenica). 2012;9:350–5. Aydin A, Gulec M, Boysan M, Selvi Y, Selvi F, Kadak MT, et al. Seasonality of self-destructive behaviour: seasonal variations in demographic and suicidal characteristics in Van, Turkey. Int J Psychiatry Clin Pract. 2013;17:110–9. Mann JJ. A current perspective of suicide and attempted suicide. Ann Intern Med. 2002;136:302–11.