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Factors predicting abnormal liver function tests induced by Graves' disease alone: a retrospective cohort study
Ruiguo Zhang1, Xun Tian, Lan Qin
1From the Department of Nuclear Medicine, Tianjin First Central Hospital (RGZ, LQ, JQW, JS); Department of Pathology, Research Institute of Liver Diseases, Tianjin Second People's Hospital, Tianjin (XT); and Department of Radiology, The Sixth Affiliated People's Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai, China (XEW).
Graves' disease frequently causes abnormal liver function tests (LFTs). Higher levels of free thyroxine (FT4) and TSH receptor antibodies (TRAb) independently predict these LFT abnormalities in patients with Graves' disease.
Area of Science:
- Endocrinology
- Hepatology
- Internal Medicine
Background:
- Abnormal liver function tests (LFTs) are a common clinical finding in patients diagnosed with Graves' disease (GD).
- Limited data exist regarding the specific factors or biochemical markers that contribute to LFT abnormalities in this patient population.
- Understanding these predictors is crucial for managing GD and preventing potential liver complications.
Purpose of the Study:
- To investigate the factors and biochemical indexes that predict the occurrence of abnormal LFTs solely due to Graves' disease.
- To identify independent risk factors for LFT abnormalities in newly diagnosed, untreated GD patients.
Main Methods:
- Retrospective analysis of 289 newly diagnosed, untreated Graves' disease patients.
- Patients categorized into two groups: abnormal LFTs (Group A) and normal LFTs (Group B).
- Logistic regression and Receiver Operating Characteristic (ROC) curve analysis employed to identify predictive factors and optimal cutoffs.
Main Results:
- Over 70% of patients (205/289) exhibited at least one abnormal LFT.
- Univariate analysis revealed significantly higher FT3, FT4, and TRAb levels in Group A compared to Group B.
- Binary logistic regression identified elevated FT4 concentration (OR: 1.017) and TRAb levels (OR: 1.038) as independent predictors of abnormal LFTs. Optimal cutoffs were FT4 ≥ 75 pmol/L and TRAb ≥ 15 IU/L.
Conclusions:
- Elevated free thyroxine (FT4) and TSH receptor antibody (TRAb) levels are significant independent risk factors for abnormal liver function tests in Graves' disease.
- The study provides specific biochemical thresholds (FT4: 75 pmol/L, TRAb: 15 IU/L) for predicting LFT abnormalities in GD patients.
- These findings aid in risk stratification and clinical management of Graves' disease patients with potential liver involvement.
