Table 3.
Breakdown of thyroid analytes into quartiles
| Analyte | Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 |
|---|---|---|---|---|
| 3,3′-T2 | ||||
| Concentration range (pg/mL) |
2.51-7.48 | 7.74-12.4 | 12.5-17.8 | 17.9-45.8 |
| Number | 24 | 26 | 24 | 25 |
| rT3 | ||||
| Concentration range (ng/dL) |
4.84-11.0 | 11.2-15.4 | 15.5-22.2 | 22.4-109.0 |
| Number | 24 | 26 | 25 | 25 |
| T3 | ||||
| Concentration range (ng/dL) |
5.66-45.3 | 46.1-78.0 | 78.1-92.1 | 92.5-166.0 |
| Number | 25 | 25 | 26 | 24 |
| T4 | ||||
| Concentration range (mcg/dL) |
1.73-6.18 | 6.36-7.80 | 7.85-10.3 | 10.5-14.1 |
| Number | 25 | 25 | 26 | 24 |
| TSH | ||||
| Concentration range (mIU/L) |
0-0.45 | 0.48-0.98 | 0.99-2.16 | 2.23-29.3 |
| Number | 25 | 25 | 25 | 25 |
Reference intervals are as follows: 3,3′-T2 6.7-23 pg/mL;; rT3 7.7-23.1 ng/dL; T3 74-168 ng/dl; T4 4.2-10.9 mcg/dL; TSH 0.40–4.00 mIU/L