Objective: We aimed to examine if abdominal obesity defined by waist-to- height ratio (WHtR) or waist circumference (WC) percentile increases the risk of dyslipidemia independently from general obesity by BMI percentile.
Methods: We analyzed lipid profile data of 5,207 adolescents aged 12-18 years (2,776 boys and 2,431 girls) who participated in the Korea National Health and Nutrition Examination Surveys from 2007 to 2015.
Results: The prevalences of dyslipidemia (29.5% vs. 25.0%), hypo-HDL- cholesterolemia (18.2 vs. 10.1%), hypertriglyceridemia (13.7% vs. 11.4%) were higher in boys than in girls (P < 0.0001), whereas those of hypercholesterolemia (4.5% vs. 8.5%) and hyper-LDL-cholesterolemia (4.0% vs. 6.8%) was higher in girls than in boys (P < 0.0001). As BMI percentile values increase, the prevalence of dyslipidemia, hypercholesterolemia, hypo-HDL-cholesterolemia, hypertriglyceridemia, and hyper-LDL-cholesterolemia significantly increased in both genders. Significantly increased prevalence of dyslipidemia was noted in boys with abdominal obesity, especially in underweight or normal weight boys, and abdominal obesity determined by WHtR > 90 percentile was more valuable in selecting subjects with dyslipidemia risk compared with WC > 90 percentile. Girls with abdominal obesity determined by WHtR > 90 percentile did not show increased prevalence of dyslipidemia regardless of BMI status, but overweight girls with WC > 90 percentile demonstarted significantly higher dyslipidemia prevalence compared with overweight girls with WC < 90 percentile. Odds ratios (OR) for dyslipidemia were WHtR > 90 percentile (OR = 2.42) in boys and WC > 90 percentile in girls (OR = 1.77) after controlling for their general obesity.
Conclusion: Dyslipiemia in adolescents is strongly associated with abdominal obesity. Lipid screening should be considered in adolescents with abdominal obesity regardless of their BMI status.