[Cardiometabolic risk in children with severe obesity].

Introduction: severe obesity has had a greater increase than non-severe obesity in Chilean schoolchildren during the last years. We do not know whether the cut-off point currently used to define severe obesity in children (BMI ≥ + 3 DE, WHO-2007 curves) is associated with a greater biological risk in our population. Objective: to describe and compare cardiometabolic risk in schoolchildren with severe vs. non-severe obesity. Methods: a secondary analysis of a sample of 3,325 schoolchildren was performed, in which cardiometabolic risk factors were studied. The prevalence of these was compared in the subsample of 589 schoolchildren with obesity according to whether it was severe or not, and the respective ORs were calculated. Results: mean age was 11.4 ± 0.98 years, 46 % were girls, and 11.5 % of the sample had severe obesity, with a higher prevalence of most of the factors studied and no differences in chronic disease, obesity or education in parents, or physical activity of the child. The risk of those with severe obesity for central obesity, insulin resistance, high blood pressure, and metabolic syndrome reached an OR of 12.9, 3.2, 2.67, and 1.92, respectively, as compared to those with non-severe obesity. Conclusion: this definition of severe obesity in childhood favors the identification of children with higher cardiometabolic comorbidity, which allows to focus the efforts of secondary prevention and its most timely treatment.