A healthy result should fall into the range 1.2 - 4.3 Units.
The T7 Index is the product of T4 x T3 Uptake, divided by 100. it is also known as the Free Thyroxine Index.
T7= (T4 x T3-Uptake)/100
This calculation is an attempt to correct for variations in thyroxine binding proteins.
Result interpretation:
| Disorder | Total T4 | T3 Uptake | T7 |
| Primary hypothyroid | Decreased | Decreased | Decreased |
| Secondary hypothyroid | Decreased | Decreased | Decreased |
| Hyperthyroid | Increased | Increased | Increased |
| T3 Toxicosis | Normal | Normal | Normal |
Reference ranges:
insert the value from you T7 Index test result.
T7 will usually be decreased in patients with hypothyroidism. It may also be low in patients with non-thyroid illness.
T7 will usually be elevated in patients with hyperthyroidism.
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Ceruloplasmin, Cyclic AMP, Plasma, Dihydrotestosterone (female), Dihydrotestosterone (male), Estimated Average Glucose (eAG), Free Androgen Index, Free testosterone, Free Testosterone, Direct (Female), Free Thyroxine, Free Thyroxine Index, Glucose, Glutamic Acid Decarboxylase, Hemoglobin A1c (HbA1c), Homocysteine, Insulin (Fasting), Insulin-Like Growth Factor I (IGF-1), Parathyroid Hormone (PTH), Serum, Pregnenolone, Reverse T3, Serum, Sex Hormone-Binding Globulin (SHBG), T3, Free, T4, Free, T4, Total (Thyroxine), T7 Index, Testosterone, Testosterone (Female/Child), Testosterone, Serum (Female), Thyroglobulin, Thyroglobulin Antibodies, Thyroid Peroxidase Antibodies (Anti-TPO Ab), Thyroid-Stimulating Hormone (TSH), Thyrotropin Receptor Ab, Serum, Thyroxine-binding globulin, TBG, Total T3, Tri iodothyronine (T3) Uptake, Triiodothyronine, Serum
