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title: RefLab
emoji: 🧪
colorFrom: gray
colorTo: green
sdk: static
pinned: false
license: mit
short_description: Tietz 7e reference intervals and biological variation
---
# RefLab
Reference-interval lookup built from Appendix A of the Tietz Textbook of Clinical Chemistry and
Molecular Diagnostics, 7th edition (Tables A.1–A.5), with Ricos biological-variation
specifications attached where they exist.
- **RefCheck** — analyte, age, sex and a result in either unit; verdict, interval in both units,
conversion factor, critical-value flag.
- **RefSurf** — every partition an analyte has, as tables, range bars and interval-versus-age plots.
- **Critical** — Table A.5 risk thresholds.
429 entries · 2447 partitions · 64 critical values · 114 analytes with biological-variation data.
Everything runs client-side in a single `index.html`; no server, no network calls.
Reference intervals are method- and population-dependent. Each laboratory establishes or verifies
its own intervals (CLSI EP28-A3c) before clinical use. Not a diagnostic device.
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