Assessing the Prevalence of Nonalcoholic Fatty Liver Disease and Advanced Fibrosis in Patients With Type 1 Diabetes Using Vibration-Controlled Transient Elastography and Noninvasive Scores

Brief Summary

Detailed Description

This is a prospective cohort, single-center, single-arm study screening adult subjects with type 1 diabetes from the Joslin Diabetes Center outpatient clinic mainly through physician referrals for NAFLD and advanced fibrosis. Subjects will undergo a one-time screening which will last for about 30 minutes. The following procedures will be conducted during the study visit: 1. Blood draw for metabolic measurements (HbA1c, lipid panel, ALT, AST, serum albumin, complete blood count-CBC) 2. FibroScan Measurements (LSM and CAP) 3. Anthropometric measurements (weight, height, BMI calculation, waist, and hip circumference) 4. Systolic and diastolic blood pressure Blood Draw: Samples of blood taken during the trial for laboratory testing will include the following metabolic measurements: AST, ALT, Platelets, percentage A1C, and lipid parameters (TC, LDL, HDL, TG). Fibroscan: Vibration controlled transient elastography (VCTE) or FibroScan® (EchoSens, Paris, France) is a simple aid to diagnose adult patients with chronic liver diseases. FibroScan provides a fast and reliable alternative to hepatic needle biopsy. In this 5-7 minute test, the investigator induces a mild amplitude shear wave into liver tissue from a small mechanical vibrator at the end of the FibroScan probe. VCTE evaluates a representative volume of the liver that is 100-fold greater than needle biopsy and the liver stiffness measurement (LSM) is expressed in kilopascals (kPa) with values \>9.8 kPa being consistent with the presence of advanced fibrosis/cirrhosis. Typically, 10 successful VCTE measurements with a median interquartile range/median ration of less than 30% are needed to have a reliable LSM. FIB-4 Index: This is a noninvasive surrogate biomarker of advanced fibrosis that is calculated using the following formula: FIB-4 = Age (years)×AST (U/L)/\[PLT(109/L)×√ALT(U/L)\] (Sterling, Lissen et al. 2006) FIB-4\>2.67 is consistent with the presence of advanced fibrosis with 80% PPV. NAFLD Fibrosis Score (NFS): This is a noninvasive surrogate biomarker of advanced fibrosis that is calculated using the following formula: NFS= -1.675 + 0.037 - age (years) + 0.094 - BMI (kg/m2) + 1.13 × IFG/diabetes (yes = 1, no = 0) + 0.99 × AST/ALT ratio - 0.013 × platelet count (×109/l) - 0.66 × albumin (g/dl). NFS\>0.676 is consistent with the presence of advanced fibrosis Anthropometric measurements: These include weight, height, BMI calculation, waist, and hip measurements. Measurements will be done using standardized anthropometric techniques. Follow up may be required for High-risk patients with advanced fibrosis. If patient consents, referring or treating physicians will be notified and provided with fibroscan results for possible referral to hepatologists for further evaluation and intervention.

Primary Outcomes

Secondary Outcomes

• Anthropometrics(Baseline (one time point evaluation))
• Proportion of subjects with advanced fibrosis per Fibrosis-4 (FIB-4) index(Baseline (one time point evaluation))
• HbA1c(Baseline (one time point evaluation))
• Proportion of subjects with advanced fibrosis per NAFLD fibrosis score-NFS(Baseline (one time point evaluation))
• Lipid profile(Baseline (one time point evaluation))