Jostel’s TSH Index (TSHI / sTSHI)
Jostel’s TSH Index (TSHI / sTSHI) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
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What this is
Jostel’s TSH Index (TSHI / sTSHI) is one of 230 deterministic tools in Sophie Well's Clinical Math & Conversions group. Jostel’s TSH Index (TSHI / sTSHI) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Jostel A, Ryder WD, Shalet SM. The use of thyroid function tests in the diagnosis of hypopituitarism: definition and evaluation of the TSH index. Clin Endocrinol (Oxf). 2009;71(4):529-534. Read the source ↗
Worked example: TSH index 2.42 (sTSHI -0.41) — within/above the reference band (TSHI ~1.3–4.1).
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