Laboratory Medicine ›› 2022, Vol. 37 ›› Issue (7): 618-622.DOI: 10.3969/j.issn.1673-8640.2022.07.004

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Relationship of fasting C-peptide with nonalcoholic fatty liver disease in children with obesity

AO Jiajia, ZHANG Junfeng, NIE Wenjian, YE Qing()   

  1. The Children's Hospital,Zhejiang University School of Medicine,the National Clinical Research Center for Child Health,Hangzhou 310052,Zhejiang,China
  • Received:2020-11-15 Revised:2021-09-10 Online:2022-07-30 Published:2022-08-26
  • Contact: YE Qing

Abstract:

Objective To investigate the relationship of fasting C-peptide with nonalcoholic fatty liver disease(NAFLD) in children with obesity. Methods A total of 211 obese children diagnosed with NAFLD by abdominal ultrasound(NAFLD group) were enrolled,and 119 obese children were enrolled as control group. Among them,serum levels of total protein(TP),albumin(Alb),gamma glutamyltransferase(GGT),alanine aminotransferase(ALT),aspartate aminotransferase(AST),total cholesterol(TC),triglyceride(TG),creatinine(Cr),fasting blood glucose(FBG),high-density lipoprotein cholesterol(HDL-C),low-density lipoprotein cholesterol(LDL-C),white blood cell(WBC) count,platelet(PLT) count,hemoglobin(Hb),fasting C-peptide,glycated hemoglobin A1c(HbA1c),fasting insulin(FINS) were determined,and homeostasis model assessment for insulin resistance(HOMA-IR) was calculated. Using propensity score matching,82 patients were matched in a ratio of 1∶1 with sex,age,blood pressure,body mass index(BMI) as control variables and the relation of fasting C-peptide and the risk of NAFLD were analyzed. Multivariate stepwise Logistic regression analysis was used to evaluate the risk factors of NAFLD. Results After propensity score matching,the levels of ALT,AST,GGT,TP,fasting C-peptide,FINS and HOMA-IR in NAFLD group were higher than those in control group(P<0.05),and there was no statistical significance in the other indicators between the 2 groups(P>0.05). Multivariate stepwise Logistic regression analysis showed that ALT and fasting C-peptide were risk factors for NAFLD [odds ratios(OR) were 1.057 and 3.307,95% confidence intervals(CI) 1.036-1.078 and 1.439-7.602,respectively]. According to the tertiles of fasting C-peptide,the children were classified into C-peptide≤1.06 pmol/mL group,C-peptide 1.07-1.41 pmol/mL group and C-peptide ≥1.42 pmol/mL group. After the adjustment for confounding factors(age,sex,BMI,waist circumference,systolic blood pressure,ALT,Cr,TG,HDL-C,HOMA-IR and WBC count),C-peptide ≥1.42 pmol/mL was a risk factor for NAFLD(OR= 4.635,95%CI 1.610-13.346). Conclusions Fasting C-peptide plays a role in the early diagnosis of NAFLD in children with obesity.

Key words: C peptide, Nonalcoholic fatty liver disease, Obesity, Children

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