Interpretation of TSH 1.02 and T4 132
Normal Thyroid Function
These laboratory values indicate normal thyroid function (euthyroidism) and require no treatment or intervention. 1, 2
Understanding Your Results
TSH of 1.02 mIU/L falls well within the normal reference range of 0.45-4.12 mIU/L, representing optimal thyroid function close to the geometric mean of 1.4 mIU/L found in disease-free populations 1, 3
T4 of 132 nmol/L (assuming units of nmol/L, equivalent to approximately 10.2 mcg/dL) is solidly within the normal range, confirming adequate thyroid hormone production 1, 2
The combination of normal TSH with normal T4 definitively excludes both overt and subclinical thyroid dysfunction with greater than 99% accuracy 1, 3
Clinical Significance
TSH is the most sensitive screening test for thyroid function, with sensitivity above 98% and specificity greater than 92% 1, 4
Your TSH value indicates the pituitary-thyroid feedback loop is functioning normally, with appropriate thyroid hormone production 3, 5
Individual variation in thyroid function tests within a person over time is quite narrow (typically <10%), meaning these values likely represent your stable baseline 6
What This Rules Out
Hypothyroidism (overt or subclinical): TSH would be elevated above 4.5 mIU/L 1, 2
Hyperthyroidism (overt or subclinical): TSH would be suppressed below 0.1-0.45 mIU/L 1, 7
Central hypothyroidism: Both TSH and T4 would be low or inappropriately normal with symptoms 1
No Action Required
No treatment is indicated - these values represent normal thyroid function 1, 2
No repeat testing is necessary unless symptoms of thyroid dysfunction develop (unexplained fatigue, weight changes, temperature intolerance, palpitations) 1, 2
Routine screening intervals are not recommended for asymptomatic individuals with normal thyroid function tests 1