چکیده:
Nowadays, the Waist-Hip Ratio is considered one of the most important indices in predicting the risk of cardiovascular diseases. The usual method for calculating this index is by measuring the waist and hip circumferences with a measuring tape. However, bioelectrical impedance analysis (BIA) devices are also capable of calculating this ratio. Hence, the goal of this study was to calculate this ratio with the BIA device and to compare it with the manual method done with measuring tape. A cross-sectional study was conducted on 270 individuals attending the Sports Medicine Department of Taleghani Hospital. Height, weight, waist and hip circumference were measured, and the body mass index (BMI) and waist-hip ratio (WHR) were calculated. Using the BIA technique, the body fat percentage (BFP) and WHR were calculated. The absolute and difference percentage between the values calculated by the device and measuring tape were calculated and the determinant factors of this difference were examined. The mean absolute difference between the two methods was 0.054 and the difference percentage was 0.064. Kappa’s correlation coefficient between the two variables was 0.024, which indicates poor correlation between the findings of the two methods. Based on linear regression analysis, BFP, height, BMI, and total body water (TBW) significantly affected the difference percentage. On the contrary, age, waist circumference, hip circumference, and absolute body fat did not have such an effect. The absolute difference was 0.069 in women and 0.05 in men, which was statistically significant (p = 0.025). Taking the manual waist-hip ratio method as the gold standard, the BIA method lacks adequate accuracy. Many variables such as, gender, BFP, TBW, BMI and height affect the accuracy of this method. Hence, until this technique is modified based on the aforementioned variables, we recommend avoiding the application of this method for WHR calculation.
خلاصه ماشینی:
"Comparing the Accuracy of Waist-Hip Ratio Calculation by the BIA device versus the Manual Method 1Amir Hossein Abedi Yekta, 1Shahrzad Khosravi*, 1Mohammad Hassabi, 1Mehrshad Poorsaid Esfahani, 1Bahar Hassanmirzaei, 1Ahmadreza Asgari 1Department of Sports Medicine, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
For example, one study in our country examined the BMI, WHR and BFP in‘veterans hurt by chemical weapons’ of Khorasan Razavi province with the Bioelectrical impedance analysis or BIA device, and concluded that these individuals required special planning and interventions as obesity is highly prevalent among them (10).
Therefore, in this study, we sought to examine the accuracy of WHR calculation by the BIA device as opposed to the manual method (by measuring tape).
Table 1 shows the range and mean of the quantitative data, including, height, weight, BMI, waist circumference, hip circumference, waist-hip ratio calculated by both methods, absolute value of body fat, body fat percentage, and total body water (TBW).
Based on the results of linear regression analysis, BFP, height, BMI, and TBW significantly affected the difference percentage; while, age, WC, HC, and absolute body fat did not have such an effect )Table 3).
Here, we observed that women differ from men in their anthropometric indices, including, BMI, BFP, WC, WHR calculated by both methods, and TBW, which is in line with the findings of earlier studies (2, 6, 7).
CONCLUSION To examine and compare the difference between WHR calculation by methods other than the manual method (with measuring tape), we recommend conducting studies on bigger sample sizes and the employment of other devices."