Abstract P237: Sex and Body-mass Index Specific Percentiles for Neck and Waist Circumference in the Longitudinal Study of Adult Health: ELSA Brasil
Background: Waist circumference (WC) and neck circumference (NC) have been linked with higher cardiovascular risk, which cannot be explained only by the association with higher BMI. Therefore, the distributions of predicted neck circumference and waist circumference values according to BMI may be a useful measurement of fat distribution.
Aim: To describe percentiles for WC and NC according to BMI and stratified by sex in a large non-clinical based sample of middle-aged Brazilians.
Methods: From the 15105 participants from ELSA-Brasil, 15085 partcipants with complete data were included in this analysis. Height and weight were measured using a standardized scale, and BMI was calculated by dividing body weight with the squared height in meters (kg/m2). Waist circumference (cm) was measured using standardized procedures and equipment. Neck circumference was measured with an inelastic tape (mm) immediately above the cricoid cartilage and perpendicular to the long axis of the neck, with the participant in a sitting position. We determined the estimated distribution function in men and women, with special interest in the 25th, 50th, 75th and 90th percentiles for neck and waist circumferences in ELSA-Brasil baseline fitting spline quantile regression models. Sex-specific nomograms were also built. Analyses were performed using R software and SPSS analytical package.
Results: We evaluated 6880 men (52.2 ± 9.3 years old) and 8205 women (52.0 ± 8.9 years old). Among men, mean WC, NC and BMI were 95.3 ± 11.7 cm, 39.5 ±2.9 cm and 27.0 ± 4.3 kg/m2, respectively. Among women mean WC, NC and BMI were 87.8 ± 12.6 cm, 34.0 ±2.6 cm and 27.0 ± 5.1kg/m2, respectively. Table 1 shows respective 25th, 50th, 75th and 90th percentiles with correspondent 95% prediction interval in cm for NC and WC by BMI and sex.
Conclusion: In this study, we describe sex-specific centile values for NC and WC according to BMI. This distribution may be useful in the study of body fat distribution as a marker of cardiovascular risk beyond BMI values.
Author Disclosures: C.P. Baena: None. B. Moura: None. A. Goulart: None. P. Lotufo: None. I. Santos: None. I. Benseñor: None.
- © 2017 by American Heart Association, Inc.