Abstract

Background: The number of obese people in children and adolescents is increasing. Along with that, comorbidity due to obesity will increase. One comorbid in obesity is low vitamin D levels. Obese children and adolescents with vitamin D deficiency have a higher BMI and thicker fat tissue.
Objective: To determine the relationship between body fat thickness and vitamin D levels in obese adolescents.
Methods: This study is an analytical cross-sectional study with the subject of obese adolescents, recruited consecutively at several junior secondary schools in the city of Denpasar from September 2016 to June 2017. Measurement of body fat thickness using Holtain Skinfold Caliper and examination of vitamin D levels with chemiluminescent immunoassay. The relationship between body fat thickness and vitamin D levels was tested using linear regression.
Result: Thirty-three subjects analyzed had mean BMI 30.85 kg/m2 average suprailiac fat thickness is 3.62, with standard deviation 0.79. Mean vitamin D levels is 19.23 ng/mL, standard deviation 4.14 ng/mL. There was a weak negative relationship between the suprailiac body fat thickness and vitamin D levels (r=0.390; p=0.025).
Conclusion: Body fat thickness with vitamin D levels in obese adolescent has a weak negative relationship.

Key words: adolescent obesity, body fat thickness, vitamin D