Comparison between bioelectrical impedance analysis and body mass index methods in determination of obesity prevalence in Ahvazi women
Comparison between bioelectrical impedance analysis and body mass index methods in determination of obesity prevalence in Ahvazi women
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DOI：
10.1038/sj.ejcn.1602545
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发表时间：
2007-04-01
影响因子：
4.7
通讯作者：
Amani, R.
中科院分区：
文献类型：
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作者：
Amani, R.
背景：肥胖在世界范围内有增加的趋势。近年来，体重指数（BMI）作为肥胖分类的分界点在所有人群研究中的应用受到了质疑。目的：本研究的目的有三：用BMI和生物电阻抗法（BIA）测定已婚妇女肥胖和超重的患病率，评价这两种方法之间的相关性，以及用BMI和BIA测定已婚妇女肥胖和超重的方法。并根据不同文化程度的妇女进行肥胖程度的比较。637名18-40岁的健康已婚妇女，她们曾到阿瓦士市的14个保健中心就诊（Khouzestan省，伊朗西南部的中心）招募了一个横断面设计，他们的社会经济和人体测量问卷完成的培训学生。采用BIA法测定体脂百分比（%BF）和体脂量（BFM）。BMI > 25和> 30 kg/m2分别作为判定超重和肥胖妇女的标准。以%BF > 35%作为肥胖的临界值。年龄为26.9 +/- 5.8岁，大多数为中等教育程度的家庭主妇。他们的BMI、%BF、腰臀比和中上臂围平均值分别为：25.9（4.7）kg/m2、27.6（7.3）%、0.75（0.08）和27.9（3.9）cm。中心性肥胖的患病率为21.2%。BMI和BIA方法确定的肥胖患病率分别为18.3%和15.5%，这些方法分别在44.7%和46%的受试者中检测到正常范围内的女性。然而，瘦（体重不足）的妇女分别占研究对象的2.6%和14.6%。大约一半的妇女超重或肥胖。BMI与BFM（r=0.86; P < 0.0001）和%BF（r=0.77; P < 0.0001）相关。结论：阿瓦孜族已婚妇女中约有一半存在肥胖和超重，超过五分之一的妇女存在向心性肥胖。BIA和BMI法对正常和肥胖已婚妇女的检出率相近，但对低体重女性的检出率不同。受教育程度较高的女性往往具有较低的BMI水平。
Background: Obesity has an increasing trend worldwide. Recently, application of body mass index (BMI) cutoff points of obesity classification for all population studies has been questioned. On the other hand, bioelectrical impedance analysis (BIA) is a safe, accurate, reliable and inexpensive method for screening the overweight and obesity in such studies.Objectives: There were three objectives followed in this research: to determine the prevalence of obesity and overweight in married women using BMI and BIA methods; to evaluate the correlation between these methods; and to compare the women's obesity degrees according to their educational levels.Method: Six hundred and thirty-seven healthy married women 18-40 years aged, who had referred to 14 health centers of the city of Ahvaz (center of Khouzestan province, south-west of Iran) were recruited in a cross-sectional design, and their socioeconomic and anthropometric questionnaires were completed by the trained students. Body fat percent (%BF) and body fat mass (BFM) were measured using BIA method. BMI > 25 and > 30 kg/m(2) were used as criteria for determining the overweight and obese women, respectively. %BF > 35% was regarded as cutoff for defining obesity.Results: Mean age +/- s.d. of the women was 26.9 +/- 5.8 years and majority of them were housewives with secondary educational level. Their BMI, %BF, waist-to-hip ratio, and mid-upper arm circumference means were: 25.9(4.7) kg/m(2), 27.6(7.3)%, 0.75(0.08) and 27.9(3.9) cm, respectively. Central obesity was prevalent in 21.2% of the subjects. Prevalence of obesity determined by BMI and BIA methods was 18.3 and 15.5% and women within normal ranges were detected in 44.7 and 46% of the subjects by these methods, respectively. However, thin (underweight) women were 2.6 and 14.6% of the subjects studied, respectively. About one half of the women were overweight or obese. BMI was statistically correlated with BFM (r=0.86; P < 0.0001) and %BF (r=0.77; P < 0.0001). Women with higher educational levels had lower body fat percentage and BMI than the other subjects with lower degrees (P < 0.05).Conclusion: Obesity and overweight is prevalent in about one-half of the Ahvazian married women and more than one-fifth of the subjects have central obesity. BIA and BMI methods can similarly detect the normal and obese married women but they are different in determining the underweight female subjects. Women with higher educational grades tend to have lower BMI levels.