CONICITY INDEX AS AN INDICATOR OF ABDOMINAL OBESITY AND PREDICTOR OF CARDIOVASCULAR RISK FOR THE BRAZILIAN POPULATION
Name: YASMIN FRANCO RODRIGUES SILVA
Publication date: 21/02/2025
Examining board:
Name |
Role |
|---|---|
| FABIANO KENJI HARAGUCHI | Examinador Interno |
| LUCIANE BRESCIANI SALAROLI | Presidente |
| MÁRCIA REGINA DE OLIVEIRA PEDROSO | Examinador Externo |
Summary: INTRODUCTION: The Conicity Index (C-index) originated from the observation that fat
accumulation around the waist favors the change in body shape from a cylinder to a
double cone, making it more sensitive to identify fat deposition in the abdominal region.
However, despite its relevance, there are still no conicity index cutoff points defined from
a representative sample of the Brazilian population. OBJECTIVE: To determine the
conicity index cutoff points and the prevalence of cardiovascular risk for the Brazilian
population. METHODOLOGY: This is a cross-sectional study using secondary data
from the 2013 National Health Survey, a household-based survey with nationwide
coverage. To determine the C-index cutoff point according to the risk classification
established by the Framingham score, ROC curve analysis was performed. Cutoff points
were defined according to specificity, sensitivity, and Youden index. All analyses were
performed using R (4.0.3) software for Windows. The significance level adopted was
5%. RESULTS: The cutoff point for the C index for women was 1.285, the area under
the curve (AUC) was 0.716, while for men it was 1.344 and AUC was 0.738. The
prevalence of cardiovascular risk assessed by the C index in the Brazilian population
was 39.6%. When segmented by sex, a prevalence of 35.37 (CI 34.0-36.73) was
observed in men and 64.6% in women. CONCLUSION: The results of this study
highlight the relevance of the C-index as a tool for assessing cardiovascular risk in the
Brazilian population, presenting specific cutoff points for men (1.344) and women
(1.285). The high prevalence of cardiovascular risk identified, especially among women,
reinforces the importance of strategies aimed at controlling abdominal obesity as a
preventive measure. The C-index showed good accuracy, as indicated by the areas
under the curve (AUC), and is a promising measure to incorporate into population
assessments and clinical practices in Brazil.
