Assessing the validity of body mass index standards in early postmenopausal women

被引:80
作者
Blew, RM
Sardinha, LB
Milliken, LA
Teixeira, PJ
Going, SB
Ferreira, DL
Harris, MM
Houtkooper, LB
Lohman, TG
机构
[1] Univ Arizona, Dept Physiol, Tucson, AZ 85721 USA
[2] Univ Tecn Lisboa, Fac Human Movement, Exercise & Hlth Lab, P-1100 Lisbon, Portugal
[3] Univ Massachusetts, Dept Exercise Sci & Phys Activ, Boston, MA 02125 USA
[4] Univ Arizona, Dept Nutr Sci, Tucson, AZ 85721 USA
来源
OBESITY RESEARCH | 2002年 / 10卷 / 08期
关键词
body mass index; percentage of fat; postmenopausal women; receiver operating characteristic analysis;
D O I
10.1038/oby.2002.108
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective: To examine the relationship between percentage of total body fat (%Fat) and body mass index (BMI) in early postmenopausal women and to evaluate the validity of the BMI standards for obesity established by the NIH. Research Methods and Procedures: Three hundred seventeen healthy, sedentary, postmenopausal women (ages, 40 to 66 years; BMI, 18 to 35 kg/m(2); 3 to 10 years postmenopausal) participated in the study. Height, weight, BMI, and %Fat, as assessed by DXA, were measured. Receiver operating characteristic analysis was performed to evaluate the ability of BMI to discriminate obesity from non-obesity using 38%Fat as the criterion value. Results: A moderately high relationship was observed between BMI and %Fat (r = 0.81; y = 1.41x + 2.65) with a SE of estimate of 3.9%. Eighty-one percent of other studies examined fell within 1 SE of estimate as derived from our study. Receiver operating characteristic analysis showed that BMI is a good diagnostic test for obesity. The cutoff for BMI corresponding to the criterion value of 38%Fat that maximized the sum of the sensitivity and specificity was 24.9 kg/m(2). The true positive (sensitivity) and false-positive (1 - specificity) rates were 84.4% and 14.6%, respectively. The area under the curve estimate for BMI was 0.914. Discussion: There is a strong association between %Fat and BMI in postmenopausal women. Current NIH BMI-based classifications for obesity may be misleading based on currently proposed %Fat standards. BMI >25 kg/m(2) rather than BMI >30 kg/m(2) may be superior for diagnosing obesity in postmenopausal women.
引用
收藏
页码:799 / 808
页数:10
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