Association of serum ferritin trends with liver enzyme patterns in β-thalassemia major: A longitudinal correlational study.

Abstract

β-Thalassemia major patients require lifelong blood transfusions, leading to iron overload and liver injury. This study examines the longitudinal association between serum ferritin and liver function over 5 years in pediatric patients. This retrospective study included 582 transfusion-dependent thalassemia patients aged 1-18 years. Serum ferritin, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and albumin were measured annually. Correlation and linear regression analyses assessed associations between ferritin trajectories and liver enzymes. Mean ferritin rose from 1820 ± 960 ng/mL at baseline to 4500 ± 1900 ng/mL at year 5, indicating worsening iron overload. AST and ALT levels also steadily climbed over follow-up, whereas albumin declined slightly. Ferritin correlated positively with AST (r = 0.675, P < 0.01) and ALT (r = 0.607, P < 0.01), but not with albumin (r = -0.143, P = 0.153) annually. The regression interaction term showed within-patient ferritin increases over time were independently associated with escalating AST and ALT (P < 0.05), after adjusting for confounders. Rising ferritin levels predict progressive liver injury in regularly transfused pediatric thalassemia patients. Tighter control of iron overload may help preserve hepatic function.