title: No significant association between vitamin D and nonalcoholic fatty liver disease in a Chinese population.
abstract: BACKGROUND
  Some research evidence from Western populations suggests that lower vitamin D is associated with the prevalence and histologically assessed severity of nonalcoholic fatty liver disease (NAFLD).
  
  
  OBJECTIVE
  To investigate the associations of serum 25-hydroxyvitamin D [25(OH)D] concentrations and vitamin D status (deficiency <20 ng/ml; insufficiency 20-30 ng/ml; sufficiency >30 ng/ml) with the prevalence of NAFLD in study population of Chinese.
  
  
  METHODS
  Serum 25(OH)D, parathyroid hormone, lipids, liver enzymes, and anthropometric characteristics were measured in 1,248 subjects aged ≥ 20 years. NAFLD was diagnosed using abdominal ultrasound examination.
  
  
  RESULTS
  The prevalence of NAFLD was 30.3 % in the total study population, 37.9 % in the male subjects, and 20.8 % in the female subjects (P < 0.0001). Subjects with NAFLD had a significantly higher body mass index, higher levels of fasting blood glucose and liver enzymes, and a more atherogenic lipid profile. However, serum 25(OH)D concentrations were not significantly different between subjects with and without NAFLD (22.1 vs. 22.8 ng/ml, respectively; P = 0.21). In addition, a 10 ng/ml higher serum 25(OH)D concentrations [odds ratio (OR) 1.02, 95 % confidence interval (CI) 0.84-1.25, P = 0.82] or vitamin D status (vs. sufficiency: deficiency OR 0.86, 95 % CI 0.54-1.37, P = 0.52; insufficiency OR 0.96, 95 % CI 0.61-1.52, P = 0.87) were not significantly associated with the presence of NAFLD in the multivariate logistic regression analyses.
  
  
  CONCLUSIONS
  Serum 25(OH)D concentrations or vitamin D status were not significantly associated with the presence of NAFLD. More studies are needed to elucidate the relationship between vitamin D and the occurrence of NAFLD in Chinese.
authors.affiliation: Department of Internal Medicine, Dali University School of Clinical Medicine, Jiashibo Road 32, Dali, 671000, Yunnan Province, China. lilihuayncn@gmail.com
authors.forename: Lihua
authors.initials: L
authors.lastname: Li
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Shaoyi
authors.initials: S
authors.lastname: Pan
authors.forename: Xinhua
authors.initials: X
authors.lastname: Wu
authors.forename: Xueyan
authors.initials: X
authors.lastname: Yin
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People; D002681:China / Q000453:epidemiology; D005234:Fatty Liver / Q000150:complications* / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D065626:Non-alcoholic Fatty Liver Disease; D014808:Vitamin D Deficiency / Q000150:complications* / Q000453:epidemiology; D055815:Young Adult