Table 1.
TSH and thyroid hormone levels for patients 1–3.
| Patient | TSH (0.2–4 µIU/mL) |
FT3 (2.2 – 6.2 pg/ mL) |
FT4 (1.3 – 2.4 ng/ dL) |
TT3 (87–180 ng/ dL) |
TT4 (5.1–11.3 µg/ dL) |
Diagnosis by TSH |
Diagnosis of biochemical hypothyroidism |
Clinical conditions |
|---|---|---|---|---|---|---|---|---|
| 1 | 2.65 | 2.1 | 1.9 | 82 | 13.4 | Euthyroid | Hypothyroid | Hypothyroid |
| 2 | 2.65 | 2.1 | 1.2 | 91 | 6.4 | Euthyroid | Hypothyroid | Hypothyroid |
| 3 | 1.33 | 2.0 | 1.2 | 45 | 3.5 | Euthyroid | Hypothyroid | Hypothyroid |
TSH: Thyroid Stimulating Hormone; FT3: Free Triiodothyronine; FT4: Free Thyroxine; TT3: Free Triiodothyronine; TT4: Free Thyroxine
TSH was measured by immunoassay and free and total thyroid hormones were measured by LC/MS-MS. Reference ranges for each analyte indicated in parenthesis. Values below the reference range are shown in red. Patient 1 data from [21].