Oregon Research Institute, 1776 Millrace Drive, Eugene, OR, 97403, USA.
Oregon Research Institute, 1776 Millrace Drive, Eugene, OR, 97403, USA.
Behav Res Ther. 2019 Jul;118:77-86. doi: 10.1016/j.brat.2019.04.002. Epub 2019 Apr 12.
Few trials have investigated factors that moderate the effects of eating disorder and obesity prevention programs, which may inform inclusion criteria and intervention refinements. We examined factors hypothesized to moderate the effects of the Healthy Weight eating disorder/obesity prevention program that promotes gradual healthy changes, and Project Health that adds cognitive dissonance activities. College students at risk for both outcomes because of weight concerns (N = 364, 72% female) were randomized to these interventions or an educational video condition, completing pretest, posttest, and 6, 12, and 24-month follow-up assessments. Healthy Weight and Project Health produced significantly larger reductions in eating disorder symptoms versus video controls for individuals with higher negative affect, emotional eating, dietary fat/sugar intake, and perceived pressure to be thin. Project Health also produced significantly less increases in BMI versus video controls for individuals with lower negative affect. Results suggest that these interventions produce larger eating disorder symptom reductions for individuals at elevated risk for eating pathology but hint that weight gain prevention effects may be attenuated by elevated negative affect. Results imply that larger eating disorder symptom reductions will result when implemented with individuals with both weight concerns and one of the additionally identified risk factors.
很少有试验研究过调节饮食失调和肥胖预防计划效果的因素，这些因素可能为纳入标准和干预措施的改进提供信息。我们研究了假设可以调节健康体重饮食失调/肥胖预防计划效果的因素，该计划促进逐渐的健康变化，以及增加认知失调活动的项目健康。由于体重问题而处于饮食失调和肥胖风险的大学生（N=364，72%为女性）被随机分配到这些干预措施或教育视频条件中，完成前测、后测以及 6、12 和 24 个月的随访评估。与视频对照组相比，健康体重和项目健康在负面情绪、情绪性进食、脂肪/糖摄入量和对瘦的感知压力较高的个体中，对饮食失调症状的改善效果显著更大。对于负面情绪较低的个体，项目健康在 BMI 增加方面的效果也显著低于视频对照组。结果表明，这些干预措施对处于饮食障碍风险较高的个体产生了更大的饮食失调症状减轻效果，但暗示体重增加预防效果可能会被较高的负面情绪所减弱。结果表明，当与既有体重问题又有另外确定的风险因素之一的个体一起实施时，会产生更大的饮食失调症状减轻效果。
