Expression of Circulating MicroRNAs Associated with Obesity and their Relationships with Biochemical Parameters and Health-related Physical Fitness in Children 6 to 10 Years Old in Cali, Colombia.

BACKGROUND: Obesity is a public health problem worldwide; it has reached pandemic proportions in the last 40 years. Its prevalence in children and adolescents increased from 0.7% to 7.8% between 1975 and 2016. Recently, microRNAs (miRNAs) have been reported as regulatory factors related to molecular functions under different conditions. These can be used as biomarkers of a disease to estimate risks in the early stages. OBJECTIVE: This study aimed to determine the expression levels of miRNAs associated with childhood obesity and their relationships with biochemical parameters and Health-related Physical Fitness (HRPF). METHODS: This was a descriptive cross-sectional study in which a population of 40 children between 6 and 10 years of age of both sexes from Cali, Colombia, was evaluated; the children were classified as 20 normal-weight and 20 obese. Blood biochemistry, HRPF, and miRNA expression levels were determined (hsa-miR-122-5p, hsa-miR-15b-5p, hsa-miR-191-5p, hsa-miR-486-3p, hsa-miR-222-3p. Comparisons were made between the groups, miRNA associations between the studied variables, and linear regression analysis. RESULTS: Twenty normal-weight and 20 obese patients were evaluated. Both groups had an average age of eight years old. The miRNA hsa-miR-122-5p (p < 0.05) was overexpressed in the obese group. According to the linear regression analysis, the amount of adipose tissue may be associated with the production of miRNAs (hsa-miR-15b-5p, hsa-miR-222-3p, hsa-miR-122-5p, and hsamiR- 191-5p). CONCLUSION: Four miRNAs (hsa-miR-15b-5p, hsa-miR-222-3p, hsa-miR-122-5p, and hsa-miR- 191-5p) are associated with modifications in biochemical variables of HRPF in this group. Adipose tissue mass could be associated with the production of these miRNAs, thus making them biomarkers of childhood obesity risk.

[Concordance of the assessment of pubertal development with the Tanner scale between adolescents and a trained physician]. / Concordancia en la evaluación del desarrollo puberal mediante la escala de Tanner entre adolescentes y un médico entrenado.

OBJECTIVES.: To assess the concordance between self-assessment of pubertal development with the Tanner scale performed by adolescents compared to the assessment performed by a trained physician. MATERIALS AND METHODS.: As part of the SIMAC project, data was collected on 244 adolescents. At baseline, we included an anthropometric and pubertal development assessment, with a self-assessment by the participants. RESULTS.: We included 229 teenagers from 12 to 17 years old. The agreement between the self-assessment and the clinical evaluation with the Tanner scale presented an 88.3% agreement and a weighted kappa coefficient of 0.554. The self-assessment in women showed a good agreement ( kappaweighted=0.653) and in men a moderate agreement (kappaweighted=0.464). The only variable with a significant influence on the agreement ability was gender; the disagreement probability in males was 63% greater than in females, regardless of age, height, or weight (95% CI: 1,18-2, 26). CONCLUSIONS: . Self-assessment was not accurate enough to replace medical examination, especially in males. More research is needed on this subject considering the impact that self-assessment of sexual development could have.

OBJETIVOS.: Evaluar la concordancia entre la autoevaluación del desarrollo puberal mediante la escala de Tanner realizada por adolescentes, comparado con la evaluación efectuada por un médico entrenado. MATERIALES Y MÉTODOS.: Los datos de 244 adolescentes fueron recolectados como parte del proyecto SIMAC. En la línea de base incluimos una evaluación antropométrica y del desarrollo puberal, con una autoevaluación por parte de los participantes. RESULTADOS.: Incluimos 229 adolescentes de 12 a 17 años. La concordancia entre la autoevaluación y la evaluación clínica de la escala de Tanner presentó un acuerdo obtenido de 88,3% y un coeficiente kappa ponderado de 0,554. La autoevaluación en mujeres demostró una concordancia buena (kappapond=0,653), y en varones una concordancia moderada (kappapond=0,464). La única variable con una influencia significativa sobre la capacidad de acuerdo fue el sexo; la probabilidad de desacuerdo en los varones fue 63% mayor que en las mujeres, independiente de edad, talla y peso (IC 95%:1,18-2,26). CONCLUSIONES.: La autoevaluación no fue lo suficientemente precisa para reemplazar el examen médico, sobre todo en los varones. Se requieren más estudios en relación con este tema, reconociendo el impacto que podría llegar a tener la autoevaluación del desarrollo sexual.

Concordancia en la evaluación del desarrollo puberal mediante la escala de Tanner entre adolescentes y un médico entrenado / Concordance of the assessment of pubertal development with the Tanner scale between adolescents and a trained physician

RESUMEN Objetivos. Evaluar la concordancia entre la autoevaluación del desarrollo puberal mediante la escala de Tanner realizada por adolescentes, comparado con la evaluación efectuada por un médico entrenado. Materiales y métodos. Los datos de 244 adolescentes fueron recolectados como parte del proyecto SIMAC. En la línea de base incluimos una evaluación antropométrica y del desarrollo puberal, con una autoevaluación por parte de los participantes. Resultados. Incluimos 229 adolescentes de 12 a 17 años. La concordancia entre la autoevaluación y la evaluación clínica de la escala de Tanner presentó un acuerdo obtenido de 88,3% y un coeficiente kappa ponderado de 0,554. La autoevaluación en mujeres demostró una concordancia buena (kappapond=0,653), y en varones una concordancia moderada (kappapond=0,464). La única variable con una influencia significativa sobre la capacidad de acuerdo fue el sexo; la probabilidad de desacuerdo en los varones fue 63% mayor que en las mujeres, independiente de edad, talla y peso (IC 95%:1,18-2,26). Conclusiones. La autoevaluación no fue lo suficientemente precisa para reemplazar el examen médico, sobre todo en los varones. Se requieren más estudios en relación con este tema, reconociendo el impacto que podría llegar a tener la autoevaluación del desarrollo sexual.

ABSTRACT Objectives. To assess the concordance between self-assessment of pubertal development with the Tanner scale performed by adolescents compared to the assessment performed by a trained physician. Materials and Methods. As part of the SIMAC project, data was collected on 244 adolescents. At baseline, we included an anthropometric and pubertal development assessment, with a self-assessment by the participants. Results. We included 229 teenagers from 12 to 17 years old. The agreement between the self-assessment and the clinical evaluation with the Tanner scale presented an 88.3% agreement and a weighted kappa coefficient of 0.554. The self-assessment in women showed a good agreement ( kappaweighted=0.653) and in men a moderate agreement (kappaweighted=0.464). The only variable with a significant influence on the agreement ability was gender; the disagreement probability in males was 63% greater than in females, regardless of age, height, or weight (95% CI: 1,18-2, 26). Conclusions . Self-assessment was not accurate enough to replace medical examination, especially in males. More research is needed on this subject considering the impact that self-assessment of sexual development could have.