Kovalchik S
University of California Los Angeles - UCLA, Department of Biostatistics, UCLA School of Publich Health, Los Angeles, CA, USA.
Eat Weight Disord. 2008 Dec;13(4):176-82. doi: 10.1007/BF03327504.
Initial body mass index (BMI) and rate of weight loss are compared between cohorts of pathological and healthy dieters. The eating disordered sample consists of young adults reported in case studies in the past ten years with a primary diagnosis of anorexia nervosa (AN). The healthy dieters were adolescents who participated in the National Longitudinal Survey of Adolescent Health and indicated at the time of study enrollment that they were trying to lose weight. At diet initiation, the anorexic sample had a mean BMI (kg/m2) of 20.5 while the healthy dieters had a mean of 24.8. The median rate of weight loss was -1.87 kg per month (1 pound per week) for individuals later diagnosed with AN, while the median weight change was 0.24 kg per month for the Add Health dieters, reflecting an actual gain of 0.13 pounds per week. These findings suggest that measurable physiological characteristics during the early phase of a diet could be predictive of pathological food restriction.
对病理性节食者和健康节食者队列的初始体重指数（BMI）及体重减轻率进行了比较。饮食失调样本由过去十年案例研究中报告的、初步诊断为神经性厌食症（AN）的年轻成年人组成。健康节食者为参与了青少年健康全国纵向调查的青少年，他们在研究入组时表示正在尝试减肥。在开始节食时，厌食症样本的平均BMI（kg/m²）为20.5，而健康节食者的平均BMI为24.8。后来被诊断为AN的个体，体重减轻的中位数速率为每月-1.87千克（每周1磅），而青少年健康纵向研究节食者的体重变化中位数为每月0.24千克，这反映出实际每周增重0.13磅。这些发现表明，节食早期阶段可测量的生理特征可能预示着病理性食物限制。
