An Evaluation of Longitudinal Thyroid Hormone Levels Over the Years Before and After Patients Started on Levothyroxine

Key Points

• This research aims to evaluate how thyroid hormone levels change in patients taking levothyroxine over time.
• Conducted a population-based retrospective study
• Examined FT4 and TSH levels in hypothyroid individuals
• Compared levels to euthyroid individuals
• Analyzed changes before and after starting levothyroxine
• Follow-up showed increasing differences in FT4 and TSH between treated hypothyroid and euthyroid individuals
• Indicates a need for adjusted titration strategies in levothyroxine treatment