Lms tables for waist circumference and waist-height ratio in colombian adults: analysis of nationwide data 20102756 Board #279 June 3, 1100 AM - 1230 PM
Prieto-Benavides, Daniel Humberto
Correa Bautista, Jorge Enrique
PURPOSE: Indices predictive of central obesity include waist circumference (WC) and waist-to-height ratio (WHtR). The aims of this study were to establish a Colombian smoothed centile charts and LMS tables for WC and WHtR; appropriate cut-offs were selected using receiver operating characteristic analysis based on data from the Colombian representative sample. METHODS: We used data from the cross-sectional, national representative nutrition survey, 2010. A total of 83,220 participants (aged 20-64 years) were enrolled. Weight, height, body mass index (BMI), WC and WHtR were measured and percentiles were calculated using the LMS method. Receiver operating characteristics curve analyses were used to evaluate the optimal cut-off point of WC and WHtR for overweight and obesity based on the WHO definitions. RESULTS: We found a strong positive correlation between WC and BMI (r=0.847, p < .01) and WHtR and BMI (r=0.878, p < .01). To overweight category in men, the cut-off point value of 87.6 cm for the WC provided a sensitivity of 87.6%, a LR (+) value of 7.01, specificity of 87.5% and LR (-) value of 0.14. In women, the cut-off point value of 84.0 cm for the WC provided a sensitivity of 84.0%, a LR (+) value of 7.30, specificity of 88.5% and LR (-) value of 0.18. In obesity category in men, the cut-off point value of 96.6 cm for the WC provided a sensitivity of 92.9%, a LR (+) value of 7.31, specificity of 87.3% and LR (-) value of 0.08. In women, the cut-off point value of 91.0 cm for the WC provided a sensitivity of 89.2%, a LR (+) value of 6.42, specificity of 86.1% and LR (-) value of 0.13. ROC curve for WHtR was also obtained and the cut-off point value of 0.521 was used. To overweight category considering this cutoff point, in men sensitivity was 88.8%, LR (+) value of 5.80, specificity 84.7% and LR (-) 0.13. In women the cut-off point value was 0.536, sensitivity 85.8%, LR (+) value of 6.01, specificity 85.8% and LR (-) 0.17. To obesity in men the cut-off point value of 0.579 was used. The sensitivity was 90.7%, LR (+) value of 6.98, specificity 87.0% and LR (-) 0.11. In women, the cut-off point value was 0.587 with sensitivity 84.5%, LR (+) value of 5.80, specificity 84.5% and LR (-) 0.12. CONCLUSIONS: By providing LMS tables for adults based on Colombian reference data, we hope to provide quantitative tools for the study of obesity and its complications.
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