Correlation of Liver Enzymes and Serum Ferritin in Patients With β-Thalassaemia Major
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Abstract
Background: β-Thalassemia major is a hereditary hematological disorder that necessitates regular blood transfusions, leading to iron overload and subsequent liver injury. Elevated serum liver enzymes and ferritin are commonly used to monitor liver function in these patients; however, their reliability in predicting true hepatic dysfunction remains unclear.
Objective: To determine the sensitivity, specificity, and diagnostic accuracy of serum liver enzymes and ferritin in predicting liver dysfunction, with hypoalbuminemia as the gold standard, in pediatric patients with β-thalassemia major.
Methods: This cross-sectional validation study was conducted at the Department of Paediatrics, Combined Military Hospital, Rawalpindi, from July 2022 to February 2024. A total of 75 pediatric patients with β-thalassemia major were included using consecutive non-probability sampling. Patients with concurrent liver diseases, metabolic disorders, or conditions that could alter liver enzyme levels were excluded. Blood samples were collected to measure serum Alanine Transaminase (ALT), Aspartate Transaminase (AST), γ-Glutamyltransferase (γ-GT), ferritin, and albumin levels. Hypoalbuminemia was defined as a serum albumin level <3.5 g/L. The diagnostic accuracy, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of ALT, AST, γ-GT, and ferritin in predicting hypoalbuminemia were calculated using 2×2 contingency tables. Data were analyzed using SPSS version 25.
Results: Among the 75 patients, 18 (24.0%) exhibited hypoalbuminemia. The sensitivity, specificity, and diagnostic accuracy of ALT in detecting hypoalbuminemia were 83.33%, 31.58%, and 44.00%, respectively. For AST, these values were 50.00%, 29.82%, and 34.67%, respectively. γ-GT showed a sensitivity of 83.33%, specificity of 14.04%, and diagnostic accuracy of 30.67%. Ferritin had a sensitivity of 83.33%, specificity of 19.30%, and diagnostic accuracy of 34.67%. None of the markers showed satisfactory predictive value for hypoalbuminemia. There was a partial correlation between hyperferritinemia and elevated liver enzymes, with γ-GT showing the highest sensitivity (91.80%) and diagnostic accuracy (82.67%).
Conclusion: Serum liver enzymes and ferritin are not reliable markers for predicting liver dysfunction as indicated by hypoalbuminemia in pediatric patients with β-thalassemia major. These findings suggest that additional clinical assessments and more specific biomarkers are necessary for accurate evaluation of liver health in this population.
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