Backgound.
Prevalence of Nonalcoholic fatty liver disease (NAFLD) in China is increasing recently, and the prevalence rate and the related risk factors of it are significantly different among regions in China. Epidemiological characteristics of NAFLD in Chongqing, a southwest city of China has not been fully revealed up to now. We conducted the present study to investigate the prevalence of NAFLD and its risk factors among the population in Chongqing.
Methods.
A total of 74,870 healthy adults(38,952 men and 35,918 women, mean age: 38.69 ± 14.38 years) from a grade 3 hospital in Chongqing, China were included in the present study. All of the participants underwent anthropometric measurements, liver ultrasonography and serum examinations. Student-T test, chi-square test and logistic regression were used for statistical analysis.
Results.
The prevalence rate of NAFLD was 13.1% (9,752/74,870) with an increasing trend with age (P for trend < 0.001). Prevalence of NAFLD for men was estimated to be 3.0 times higher than women(19.1% for men and 6.3% for women,χ2 = 2726.65, P < 0.001). Gender, age, hypertension, fasting blood glucose (FBG), serum total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) and alanine transarninase (ALT) were independently correlated with the risk of NAFLD in the overall population. Among these factors, age, hypertension, FBG, TG, HDL-C, LDL-C and ALT were significantly associated with NAFLD both in male and female population. HDL-C was an independent risk factor of NAFLD for men,but not for women. Age(> 50 years) is the strongest associated factor both for male(OR 3.46) and female(OR 15.08).
Conclusions.
The prevalence of NAFLD among healthy adults in Chongqing,China was relatively high. Our results suggest that individuals in this region with higher BMI, higher FBG, hypertension, hypertriglyceridemia, and elevated ALT should pay high attention to NAFLD.