Background & Objective: Elevated TSH in hypothyroidism was a risk factor for dyslipidemia and hepatocellular injury. This study aimed to investigate the lipid profile, liver enzymes, and their independent associations with TSH in patients with newly diagnosed hypothyroidism.
Methods: A cross-sectional study included 171 patients at Vinh Phuc General Hospital (01/2025–03/2026). Multivariable linear regression was utilized to adjust for age, gender, and
BMI.
Results: The mean age was 56.8 ± 16.9 years; 77.8% were female, and 87.7% had subclinical hypothyroidism. Dyslipidemia prevalence was 67.3%. Overt hypothyroid patients had significantly higher LDL-C and total cholesterol than subclinical patients (p < 0.05). TSH positively correlated with AST (r = 0.258) and ALT (r = 0.243). In the subgroup with TSH ≥ 10 mIU/L, TSH significantly correlated with LDL-C (r = 0.331; 95% CI: 0.034 - 0.574; p = 0.030). Multivariable regression confirmed TSH as an independent predictor of elevated LDL-C (unstandardized β = 0.007; 95% CI: 0.001 - 0.013; p = 0.009).
Conclusion: Newly diagnosed primary hypothyroid patients exhibited a high dyslipidemia rate. TSH independently predicted increased LDL-C and correlated with hepatocellular injury.