Eaton Danice K, Lowry Richard, Brener Nancy D, Galuska Deborah A, Crosby Alex E
National Center for Chronic Disease Prevention and Health Promotion, Division of Violence Prevention, National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA.
Arch Pediatr Adolesc Med. 2005 Jun;159(6):513-9. doi: 10.1001/archpedi.159.6.513.
Previous research with adolescents has shown associations of body weight and perceptions of body size with suicide ideation and suicide attempts, but it is unclear whether these associations are direct or whether a mediating effect exists.
To determine if body mass index and perceived weight are associated significantly with suicide ideation and suicide attempts, controlling for weight control practices, and if perceived weight mediates the associations of body mass index with suicide ideation and suicide attempts.
DESIGN, SETTING, AND PARTICIPANTS: Data were analyzed from the 2001 Youth Risk Behavior Survey, a school-based survey administered to a nationally representative sample of students in grades 9 through 12 (N = 13 601).
Self-reported past-year suicide ideation and suicide attempts, compared by perceived weight and body mass index category, calculated from self-reported height and weight.
Body mass index category was associated significantly with suicide ideation (among all students) and suicide attempts (among white and Hispanic students) without perceived weight in the model but not with perceived weight added to the model. In contrast with those who perceive themselves as about the right weight, students who perceived themselves as very underweight (odds ratio [OR], 2.29 [95% confidence interval (CI), 1.46-3.59]), slightly underweight (OR, 1.36 [95% CI, 1.03-1.79]), slightly overweight (OR, 1.33 [95% CI, 1.12-1.58]), and very overweight (OR, 2.50 [95% CI, 1.73-3.60]) had greater adjusted odds of suicide ideation. Among white students, perceiving oneself as very underweight (OR, 3.04 [95% CI, 1.40-6.58]) or very overweight (OR, 2.74 [95% CI, 1.21-6.23]) was associated with greater odds of suicide attempts. Perceiving oneself as very underweight was associated with greater odds for suicide attempts among black (OR, 2.86 [95% CI, 1.10-7.45]) and Hispanic (OR, 3.40 [95% CI, 1.54-7.51]) students.
How adolescents perceive their body weight may be more important than their actual weight in terms of increased likelihood of suicidal behavior. Regardless of body mass index, extreme perceptions of weight appear to be significant risk factors for suicidal behavior; important racial/ethnic differences exist.
先前针对青少年的研究表明，体重及对体型的认知与自杀意念和自杀未遂之间存在关联，但尚不清楚这些关联是直接的，还是存在中介效应。
确定体重指数和感知体重是否与自杀意念和自杀未遂显著相关，同时控制体重控制行为；以及感知体重是否介导体重指数与自杀意念和自杀未遂之间的关联。
设计、背景和参与者：对2001年青少年危险行为调查的数据进行分析，该调查是一项针对9至12年级学生的全国代表性样本进行的学校调查（N = 13601）。
根据自我报告的身高和体重计算出感知体重和体重指数类别，比较过去一年自我报告的自杀意念和自杀未遂情况。
在模型中不考虑感知体重时，体重指数类别与自杀意念（在所有学生中）和自杀未遂（在白人和西班牙裔学生中）显著相关，但在模型中加入感知体重后则不然。与那些认为自己体重合适的学生相比，认为自己体重极轻（比值比[OR]，2.29[95%置信区间(CI)，1.46 - 3.59]）、略轻（OR，1.36[95%CI，1.03 - 1.79]）、略重（OR，1.33[95%CI，1.12 - 1.58]）和极重（OR，2.50[95%CI，1.73 - 3.60]）的学生，其自杀意念的调整后比值更高。在白人学生中，认为自己体重极轻（OR，3.04[95%CI，1.40 - 6.58]）或极重（OR，2.74[95%CI，1.21 - 6.23]）与自杀未遂的几率更高有关。在黑人（OR，2.86[95%CI，1.10 - 7.45]）和西班牙裔（OR，3.40[95%CI，1.54 - 7.51]）学生中，认为自己体重极轻与自杀未遂的几率更高有关。
就自杀行为可能性增加而言，青少年对自己体重的认知可能比其实际体重更重要。无论体重指数如何，对体重的极端认知似乎是自杀行为的重要危险因素；存在重要的种族/族裔差异。
