BMI评价当代大学生肥胖的准确性及其标准研究
1. 江西师范大学, 体育学院, 江西南昌 330022
2. 井冈山大学, 体育学院, 江西吉安 343009
| 摘 要： | 目的：用国家疾病防控局规定的体脂率肥胖判定标准为金标准，对大学生身体质量指数肥胖判定标准的真实性、可靠性、收益性等进行评价，讨论BMI作为体脂率有无的诊断性能及适合的截断值。方法：测试1208名在校大学生（男557人，女651人），测身高、体重推算BMI，采用电阻抗法测体脂率（Percentage of body fat, BF%）和ROC曲线截断值构建BMI肥胖诊断标准。结果：BMI作为肥胖筛查标准的真实性评价表现为特异度和假阴性率高，假阳性率与灵敏度较低；特别是女性灵敏度为0.05。男性粗一致性与约登指数高于女性。ROC曲线分析整体截断值为23.05kg/m2时，特异度和灵敏度高；男女性截断值为23.67kg/m2和23.35kg/m2时，灵敏性低、特异性高、误诊率低；BF%作为判定标准时，BMI及男女分组的诊断性能好。结论：当BMI判定标准为28kg/m2时，整体灵敏度低且男性高于女性；整体的特异度高，误诊率低。当BMI肥胖诊断值为23.05kg/m2时，可有效提高灵敏度、降低漏诊率、减少“隐匿型肥胖”者的漏诊、提高人群对肥胖的评估，错失干预时机。 |
| 关 键 词： | 电阻抗测试; 体脂率; 身体质量指数; 肥; ROC分析 |
| DOI： | 10.57237/j.mrf.2023.02.006 |
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收稿日期: 2023-04-16
接受日期: 2023-05-25
在线出版日期: 2023-06-15
BMI in Evaluating Obesity of Contemporary College Students
1. School of Physical Education, Jiangxi Normal University, Nanchang 330022, China
2. College of Physical Education, Jinggangshan University, Ji'an 343009, China
| Abstract: | Background: Changes in lifestyle and reduction in physical activity have led to a continuous increase in the number of obese people in my country, but the criteria for determining obesity are different. Body mass index (BMI) is the most commonly used indicator for obesity research. Objective: To evaluate the authenticity, reliability and profitability of the obesity determination standard of body mass index (BMI) of college students, using the body fat rate obesity determination standard proposed by the National Center for Disease Control and Prevention as the gold standard, and to discuss BMI as a diagnostic performance and suitable cut-off value for excess body fat percentage. Methods: 1208 college students (557 males and 651 females) were tested, the height and weight were measured to calculate BMI, and the electrical impedance method was used to measure the percentage of body fat (BF%) and the ROC curve cutoff value to construct the BMI obesity diagnosis. standard. Results: The authenticity evaluation of BMI as an obesity screening standard showed high specificity and false negative rate, but low false positive rate and sensitivity; especially for women, the sensitivity was 0.05. Males had higher crude concordance and Youden index than females. When the overall cut-off value of ROC curve analysis was 23.05kg/m2, the specificity and sensitivity were high; when the cut-off values for men and women were 23.67kg/m2 and 23.35kg/m2, the sensitivity was low, the specificity was high, and the misdiagnosis rate was low; BF% was used as the When determining the criteria, the diagnostic performance of BMI and male and female groups was good. Conclusion: When the BMI criterion is 28kg/m2, the overall sensitivity is low and male is higher than that of female; the overall specificity is high and the misdiagnosis rate is low. When the BMI obesity diagnosis value is 23.05kg/m2, it can effectively improve the sensitivity, reduce the missed diagnosis rate, reduce the missed diagnosis of "occult obesity", improve the evaluation of obesity in the population, and miss the opportunity for intervention. |
| Keywords: | Electrical Impedance Test; Body Fat Percentage; Body Mass Index; Obesity; ROC Analysis |
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