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      Anthropometric cutoff values for detecting metabolic abnormalities in Jordanian adults

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          Abstract

          Objectives

          To determine cutoff values for body mass index (BMI), waist circumference (WC), waist-to-hip ratio (WHR), and waist-to-height ratio (WHtR) as indicators of metabolic abnormalities in the adult Jordanian population.

          Methods

          A structured questionnaire was administered to collect relevant information. Anthropometric measurements and biochemical measurements were carried out. Receiver-operating characteristic curve analyses were used to examine the overall discriminatory power of the four anthropometric indices.

          Results

          WC cutoff values varied from 88.5 to 91.8 cm in men and from 84.5 to 88.5 cm in women. The BMI cutoff values varied from 26.2 to 27.2 kg/m 2 in men and from 27.2 to 30.0 kg/m 2 in women. The WHR cutoff values varied from 0.88 to 0.90 in men and from 80.0 to 0.83 in women. The WHtR cutoff values varied from 0.50 to 0.51 in men and women. Of all anthropometric indices, WHtR had the strongest association with each metabolic abnormality in men and women.

          Conclusion

          BMI, WC, WHR, and WHtR were found to be associated with cardiovascular disease risk factors, with WHtR being the better predictor. We recommend that health care professionals use WHtR, with a cutoff value of 0.5 for screening and counseling Jordanian people.

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          Most cited references40

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          Predictive values of body mass index and waist circumference for risk factors of certain related diseases in Chinese adults--study on optimal cut-off points of body mass index and waist circumference in Chinese adults.

          For prevention of obesity in Chinese population, it is necessary to define the optimal range of healthy weight and the appropriate cut-off points of BMI and waist circumference for Chinese adults. The Working Group on Obesity in China under the support of International Life Sciences Institute Focal point in China organized a meta-analysis on the relation between BMI, waist circumference and risk factors of related chronic diseases (e.g., high diabetes, diabetes mellitus, and lipoprotein disorders). 13 population studies in all met the criteria for enrollment, with data of 239,972 adults (20-70 year) surveyed in the 1990s. Data on waist circumference was available for 111,411 persons and data on serum lipids and glucose were available for more than 80,000. The study populations located in 21 provinces, municipalities and autonomous regions in mainland China as well as in Taiwan. Each enrolled study provided data according to a common protocol and uniform format. The Center for data management in Department of Epidemiology, Fu Wai Hospital was responsible for statistical analysis. The prevalence of hypertension, diabetes, dyslipidemia and clustering of risk factors all increased with increasing levels of BMI or waist circumference. BMI at 24 with best sensitivity and specificity for identification of the risk factors, was recommended as the cut-off point for overweight, BMI at 28 which may identify the risk factors with specificity around 90% was recommended as the cut-off point for obesity. Waist circumference beyond 85 cm for men and beyond 80 cm for women were recommended as the cut-off points for central obesity. Analysis of population attributable risk percent illustrated that reducing BMI to normal range ( or = 28) with drugs could prevent 15%-17% clustering of risk factors. The waist circumference controlled under 85 cm for men and under 80 cm for women, could prevent 47%-58% clustering of risk factors. According to these, a classification of overweight and obesity for Chinese adults is recommended.
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            Waist circumference and abdominal sagittal diameter: best simple anthropometric indexes of abdominal visceral adipose tissue accumulation and related cardiovascular risk in men and women.

            The amount of abdominal visceral adipose tissue measured by computed tomography is a critical correlate of the potentially "atherogenic" metabolic disturbances associated with abdominal obesity. In this study conducted in samples of 81 men and 70 women, data are presented on the anthropometric correlates of abdominal visceral adipose tissue accumulation and related cardiovascular disease risk factors (triglyceride and high-density lipoprotein cholesterol levels, fasting and postglucose insulin and glucose levels). Results indicate that the waist circumference and the abdominal sagittal diameter are better correlates of abdominal visceral adipose tissue accumulation than the commonly used waist-to-hip ratio (WHR). In women, the waist circumference and the abdominal sagittal diameter also appeared more closely related to the metabolic variables than the WHR. When the samples were divided into quintiles of waist circumference, WHR or abdominal sagittal diameter, it was noted that increasing values of waist circumference and abdominal sagittal diameter were more consistently associated with increases in fasting and postglucose insulin levels than increasing values of WHR, especially in women. These findings suggest that the waist circumference or the abdominal sagittal diameter, rather than the WHR, should be used as indexes of abdominal visceral adipose tissue deposition and in the assessment of cardiovascular risk. It is suggested from these data that waist circumference values above approximately 100 cm, or abdominal sagittal diameter values > 25 cm are most likely to be associated with potentially "atherogenic" metabolic disturbances.
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              How useful is body mass index for comparison of body fatness across age, sex, and ethnic groups?

              This study tested the hypothesis that body mass index (BMI) is representative of body fatness independent of age, sex, and ethnicity. Between 1986 and 1992, the authors studied a total of 202 black and 504 white men and women who resided in or near New York City, were ages 20-94 years, and had BMIs of 18-35 kg/m2. Total body fat, expressed as a percentage of body weight (BF%), was assessed using a four-compartment body composition model that does not rely on assumptions known to be age, sex, or ethnicity dependent. Statistically significant age dependencies were observed in the BF%-BMI relations in all four sex and ethnic groups (p values < 0.05-0.001) with older persons showing a higher BF% compared with younger persons with comparable BMIs. Statistically significant sex effects were also observed in BF%-BMI relations within each ethnic group (p values < 0.001) after controlling first for age. For an equivalent BMI, women have significantly greater amounts of total body fat than do men throughout the entire adult life span. Ethnicity did not significantly influence the BF%-BMI relation after controlling first for age and sex even though both black women and men had longer appendicular bone lengths relative to stature (p values < 0.001 and 0.02, respectively) compared with white women and men. Body mass index alone accounted for 25% of between-individual differences in body fat percentage for the 706 total subjects; adding age and sex as independent variables to the regression model increased the variance (r2) to 67%. These results suggest that BMI is age and sex dependent when used as an indicator of body fatness, but that it is ethnicity independent in black and white adults.
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                Author and article information

                Journal
                Diabetes Metab Syndr Obes
                Diabetes, metabolic syndrome and obesity : targets and therapy
                Dove Medical Press
                1178-7007
                2010
                18 November 2010
                : 3
                : 395-402
                Affiliations
                [1 ] Department of Community Medicine, Public Health and Family Medicine, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
                [2 ] King Abdullah University Hospital, Irbid, Jordan
                [3 ] National Center for Diabetes, Endocrinology and Genetics, Amman, Jordan
                Author notes
                Correspondence: Yousef S Khader, Department of Community Medicine, Public Health and Family Medicine, Faculty of Medicine, Jordan University of Science and Technology, PO Box 3030, Irbid 22110, Jordan, Tel +11 962 7968 02040, Fax +11 962 2709 5123, Email yousef.k@ 123456excite.com
                Article
                dmso-3-395
                10.2147/DMSOTT.S15154
                3047991
                21437109
                f02e679c-a8db-4130-9dd6-3226db98e539
                © 2010 Khader et al, publisher and licensee Dove Medical Press Ltd.

                This is an Open Access article which permits unrestricted noncommercial use, provided the original work is properly cited.

                History
                Categories
                Original Research

                Endocrinology & Diabetes
                anthropometric indices,metabolic abnormalities,receiver-operating characteristic curve,cutoff values,jordan

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