Objective: Despite growing international interest in the area of violence and suicidal ideation among school-going adolescents, epidemiological data are scant in Portugal. The objective of this study was to measure the prevalence of suicidal ideation among Portuguese adolescents from 7th to 12th grade and to estimate the association of violence exposure with suicidal ideation.

Method: A cross-sectional survey was conducted among 2 602 adolescents enrolled in public schools in Porto, Portugal. Sampling was performed in four school groups consisting of seven schools, during the 2014/2015 academic year.

Results: The results revealed that 11.4% of Portuguese school-going adolescents reported suicidal thoughts during the past 12 months. Moreover, adolescents who had been involved in physical fighting were two times more likely to have suicidal thoughts. These odds substantially increased when bullying and cyberbullying victimisation were included.

Conclusion: Effective interventions with multidisciplinary efforts involving parents, school teachers, principals, and mental health professionals, should be integrated into school-based programmes to improve adolescents’ mental health and strengthen them against suicidal ideation.

目标：尽管国际上对学龄青少年暴力和自杀意念的兴趣日益浓厚，但葡萄牙的流行病学数据很少。本研究的目的是测量 7 至 12 年级葡萄牙青少年自杀意念的流行程度，并估计暴力暴露与自杀意念之间的关联。

方法：对葡萄牙波尔图公立学校就读的 2602 名青少年进行了横断面调查。在 2014/2015 学年期间，在由七所学校组成的四个学校小组中进行了抽样调查。

结果：结果显示，在过去 12 个月内，11.4% 的葡萄牙学龄青少年报告有自杀念头。此外，参与过肢体冲突的青少年产生自杀念头的可能性是其他人的两倍。当包括欺凌和网络欺凌受害时，这些几率大大增加。

结论：应将涉及家长、学校教师、校长和心理健康专业人员的多学科努力的有效干预纳入以学校为基础的计划，以改善青少年的心理健康并加强他们对自杀意念的抵抗力。