The goal of this study was to inform theory and suicide prevention efforts by examining how the link between attempts to change weight and suicidal ideation varies across adolescence, when it is strongest, and whether there are sex differences. Data were from 13,518 youth ages 14–18 years who participated in the 2019 Youth Risk Behavior Survey, a nationally representative study of U.S. high school students. Time-varying effect modeling was used to estimate associations between attempts to change weight and suicidal ideation as continuous functions of age and to test sex differences in these links. The link between attempts to lose weight and suicidal ideation was positive and significant between ages 14.0–17.3 years, with the strongest association at age 15.0 (OR = 2.07). There were no sex differences in this age-varying association. The association between attempts to gain weight and suicidal ideation was positive and age-varying for girls, with the strongest association at age 17.2 years (OR = 2.79). This association was not significant for boys at any age. Girls and boys who are trying to lose weight and girls who are trying to gain weight may be at elevated risk for suicidal ideation between ages 14 and 18 years. Findings illuminate patterns of association during adolescence and have implications for suicide prevention.

中文翻译：

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美国青少年尝试改变体重与自杀意念之间的年龄相关性

这项研究的目的是通过研究改变体重的尝试与自杀意念之间的联系在整个青春期如何变化、何时最强以及是否存在性别差异，为理论和自杀预防工作提供信息。数据来自参加 2019 年青少年风险行为调查的 13,518 名 14-18 岁青少年，这是一项针对美国高中生的全国代表性研究。使用时变效应模型来估计改变体重的尝试与自杀意念之间的关联，作为年龄的连续函数，并测试这些联系中的性别差异。在 14.0 岁至 17.3 岁之间，尝试减肥与自杀意念之间存在显着的正相关关系，其中在 15.0 岁时关联性最强（OR = 2.07）。这种随年龄变化的关联不存在性别差异。对于女孩来说，尝试增加体重与自杀意念之间存在正相关性，并且该相关性随年龄的变化而变化，其中在 17.2 岁时关联性最强（OR = 2.79）。这种关联对于任何年龄段的男孩来说都不显着。尝试减肥的女孩和男孩以及尝试增加体重的女孩在 14 至 18 岁之间出现自杀意念的风险可能较高。研究结果阐明了青春期期间的关联模式，并对预防自杀具有重要意义。