医学生体型体型认知偏差与病理性瘦身行为的关系

目的 探讨医学生体型、体型认知偏差及病理性瘦身行为的关系，为帮助医学生树立正确体型认知、提高健康意识提供参考。方法 采用整群抽样法，于2019年1~4月对安徽医科大学543名学生进行调查，通过体格测量收集学生身高、体质量、腰围数据以评估调查对象真实体型；使用问卷调查学生自评体型、体型认知偏差与病理性瘦身行为情况。结果 医学生对自身体型评价与真实体型一致率为56.9%，一致性Kappa系数为0.258（P<0.05）。病理性瘦身行为得分为（8.98±2.95）分，多元线性回归分析显示，饮食支出占比、身体质量指数、体型认知偏差类型可解释病理性瘦身行为程度总变异的16.5%，3个变量对病理性瘦身行为均有正向预测作用（P<0.05）。结论 当前医学生存在一定体型认知偏差问题，体型认知偏差是影响医学生病理性瘦身行为的重要因素。

Relationship between body shape body shape cognitive deviation and pathological slimming behavior of medical students

Objective To explore the relationship between body shape, body shape cognitive deviation, and pathological slimming behavior among medical students, so as to provide reference for helping medical students establish correct body shape cognition and improve health awareness. Methods Using cluster sampling method, a survey was conducted on 543 students of Anhui Medical University from January to April 2019. Data on height, weight, and waist circumference were collected through physical measurements to evaluate the true body shape of the survey subjects. A questionnaire was used to investigate students'' self-evaluation of body shape, body shape cognitive deviation,and pathological slimming behavior. Results The consistency rate between medical students'' evaluation of their own body shape and their actual body shape was 56.9%, and the Kappa coefficient of consistency was 0.258(P<0.05). The score of pathological slimming behavior was(8.98±2.95) points. Multiple linear regression analysis showed that the proportion of dietary expenditure, body mass index(BMI), and body shape cognitive deviation could explain 16.5% of the total variation in the degree of pathological slimming behavior. All three variables had a positive predictive effect on pathological slimming behavior(P<0.05). Conclusions The current survival of medicine lies in the issue of body shape cognitive deviation, which is an important factor affecting pathological slimming behavior among medical students.