Optimal Range
Normal does not mean ideal.
A reference range shows the central 95% of a healthy group; it is not an ideal target. Where you sit inside it also carries information.
Reference rangeStatistic: ~95% of healthy people fall within it.
Optimal valueIn Celtt, the midpoint of the range: (lower + upper) / 2.
| TSH (0.4–4.0 mIU/L) | Value |
|---|---|
| Optimal value: (0.4 + 4.0) / 2 | 2.2 |
| Partly high zone | 3.64–4.0 |
| Deviation at 5.2: (5.2 − 4.0) / 1.8 | 66.7% |
- CLSI C28-A3 — reference interval principles
General information only; not diagnosis or treatment. Review your results with your clinician.
