Mediciones de adiposidad intraabdominal por ultrasonido y factores asociados con riesgo cardiovascular en niños obesos

• MARCELA REYES ^[1] ; ANÍBAL ESPINOZA ^[2] ; M. JESÚS REBOLLO ^[2] ; FRANCISCO MORAGA ^[2] ; VERÓNICA MERICQ ^[1] ; CARLOS CASTILLO-DURÁN ^[1]
  1. [1] Universidad de Chile

     Universidad de Chile

     Santiago, Chile

     
  2. [2] Hospital San Borja-Arriarán
• Localización: Revista Médica de Chile, ISSN-e 0034-9887, Vol. 138, Nº. 2, 2010, págs. 152-159
• Idioma: español
• Títulos paralelos:
  • Ultrasound measurements of intra-abdominal adiposity and factors associated with cardiovascular risk in obese children
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• Resumen

  • Background: Cardiovascular risk factors are commonly present in obese children. Aim: To evaluate the association among radiological measurements of intra-abdominal adipose tissue, and cardiovascular risk factors, in prepuberal obese children. Patients and Methods: We evaluated 30 obese (body mass index > p95) children aged 6 to 12 years (15 males). Anthropometry and blood pressure were measured. Subcutaneous and intra-abdominal fat thickness and fat area were measured by ultrasound (US) and computed tomography. Serum insulin, glucose and lipid profile were measured in a fasting blood sample. Homeostasis model assessment (HOMA) was calculated as an index of insulin resistance. Results: There was a significant correlation between US intra-abdominal fat thickness and HOMA (r = 0.47, p < 0.01), serum triglycerides (r = 0.46, p < 0.05) and with positive criteria for metabolic syndrome (r = 0.66, p < 0.01). A receiver operating curve (ROC) analysis showed that, above a cut-off of 45 mm for intra-abdominal fat thickness, US was able to identify insulin resistance with a sensibility and specificity of 79 and 69% respectively and metabolic syndrome with sensibility and specificity of 100 and 67% respectively. US and computed tomography measurements for intra-abdominal fat thickness were significantly correlated (r= 0.62, p < 0.01). Conclusions: US measurements of intra-abdominal fat thickness identify obesity-associated damage in childhood. Age-specific measurements of intra-abdominal adipose tissue may improve the detection power of this approach.