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Liver Stiffness Reference Values for Healthy Cuban Adults
Ángela Elvírez-Gutiérrez1, Marlén I Castellanos-Fernández1, Wendy Santillán-López1
1Gastroenterology Institute (IGE), Havana, Cuba.
Insights
Liver stiffness in healthy Cuban adults ranges from 2.2-6.3 kPa, with a reference range of 4.2-4.6 kPa. Higher body mass index and uric acid levels correlate with increased liver stiffness.
Area of Science:
- Hepatology
- Medical Diagnostics
- Public Health
Background:
- Global variations exist in reference liver stiffness values for healthy individuals.
- Optimal cutoff values for liver stiffness differ across fibrosis stages in chronic liver disease.
Purpose of the Study:
- To determine the distribution of liver stiffness in Cuban adults without liver disease.
- To investigate associations between liver stiffness and age, serum uric acid, and body mass index in this population.
Main Methods:
- A cross-sectional study involved 110 plasma donors from Havana.
- Liver stiffness was measured using FibroScan elastography.
- Correlations were assessed using the Pearson coefficient, and reference ranges calculated with mean and 95% confidence intervals.
Main Results:
- Observed liver stiffness values ranged from 2.2-6.3 kPa.
- The reference range (95% CI) for healthy Cuban adults was 4.2-4.6 kPa (mean 4.4 kPa).
- Positive correlations were found between liver stiffness and body mass index (r=0.255, p<0.01) and serum uric acid (r=0.266, p<0.01). No correlation with age was observed.
Conclusions:
- The reference range for liver stiffness in healthy Cuban adults is 4.2-4.6 kPa.
- Body mass index and serum uric acid are positively associated with liver stiffness in this population.
- This study provides the first Cuban data on liver stiffness using FibroScan, aiding clinical practice.
Introduction:
Reference values for liver stiffness for healthy individuals vary worldwide. Different optimal cutoff values correspond to the stages of fibrosis in chronic liver disease.
Objectives:
Characterize the distribution of liver stiffness in Cuban adults without liver disease and its association with age, serum uric acid and body mass index.
Methods:
A cross-sectional study was performed of 110 plasma donors recruited from the Havana Province Blood Bank January 2016 through February 2017. Measurements of liver stiffness were performed using a FibroScan elastography device on the same day of laboratory analyses and abdominal ultrasound. The Pearson coefficient was used to assess correlations, and the reference range was calculated using the mean and its 95% confidence interval.
Results:
Liver stiffness values observed ranged from 2.2-6.3 kPa. The reference range (95% CI) for the 110 subjects without known liver disease was 4.2-4.6 kPa (mean 4.4). A positive correlation was observed between liver stiffness measurements and body mass index (r = 0.255, p ⟨0.01) and serum uric acid (r = 0.266, p ⟨0.01). There was no correlation between liver stiffness and age. Liver stiffness in women was similar to that of men, 4.3 (2.4-6.1) and 4.5 (2.2-6.3) kPa, respectively (p = 0.086).
Conclusions:
Liver stiffness in Cuban adults without liver disease ranges from 2.2-6.3 kPa. The reference range is 4.2-4.6 kPa. Body mass index and serum uric acid levels are positively associated with liver stiffness.
Contribution Of This Research:
This is the first Cuban study using FibroScan to measure liver stiffness; its results will enable better assessment of liver disease in clinical practice.
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