| No. of | Age (years)* | Total fT4 | Sodium | Sodium < 135 | Sodium < 20 | |
| Blood | (pmol/L)* | (mmol/L)** | mmol/L | mmol/L | ||
| Samples | (no[%])*** | (no[%])*** | ||||
| TSH range (mU/L) | ||||||
| 4.01 - 20.0 | 193 | 60.4 (16.4) | 8.82 (1.0) | 138.0 (2.8/0.20) | 15 (=7.8%) | 0 |
| 20.01 - 75.0 | 100 | 57.2 (19.5) | 7.13 (1.9) | 137.5 (3.0/0.30) | 15 (=15%) | 0 |
| >75 | 35 | 47.6 (18.9) | 5.25 (2.0) | 137.5 (2.8/0.48) | 5 (=14.3%) | 0 |
| Total | 328 | 58.1 (18.0) | 7.92 (1.9) | 137.8 (2.9/0.16) | 35 | 0 |