Abdominal obesity increases metabolic risk factors in non-obese adults: a Hungarian cross-sectional study

Background The prevalence of abdominal obesity is increasing worldwide. Adults with abdominal obesity have been reported to have increased risk of cardiometabolic disorders. The aim of this study was to examine whether non-obese subjects (body mass index (BMI) < 25 kg/m(2)) with abdominal obesity examined in the framework of the Swiss-Hungarian Cooperation Programme had increased metabolic risk compared to participants without abdominal obesity. Methods A cross-sectional study was carried out in 5228 non-obese individuals. Data were collected between July 2012 and February 2016. Descriptive statistics, Pearson's correlation analysis and multiple logistic regression models were applied, odds ratios (OR) with 95% confidence interval (CI) being the outcomes. Results 607 (11.6%) out of the 5228 non-obese individuals had abdominal obesity. The correlation analysis indicated that the correlation coefficients between BMI and waist circumference (WC) were 0.610 in males and 0.526 in females. In this subgroup, the prevalence of high systolic blood pressure, high fasting blood glucose, and high total cholesterol and triglyceride levels were significantly higher. The logistic regression model based on these data showed significantly higher risk for developing high systolic blood pressure (OR = 1.53; 95% CI = 1.20-1.94), low HDL cholesterol (OR = 2.06; 95% CI = 1.09-3.89), and high trygliceride level (OR = 1.65; 95% CI = 1.27-2.16). Conclusions There was a very high, significant, positive correlation between WC and BMI. Abdominal obesity was found to be strongly related to certain metabolic risk factors among non-obese subjects. Hence, measuring waist circumference could be recommended as a simple and efficient tool for screening abdominal obesity and related metabolic risk even in non-obese individuals.