6db52eeec4
The previous bhutaniZones table was introduced in the initial calculator commit (61cf096, 2026-04-09) without any source citation and was systematically ~0.5-1 mg/dL below the published Bhutani 1999 curves — borderline patients got pushed into the next-higher zone. New values read directly from the Stanford Medicine Newborn Nursery reproduction of Bhutani 1999 Figure 2: https://med.stanford.edu/newborns/professional-education/jaundice-and-phototherapy/bhutani-nomogram.html Uncertainty: ±0.3 mg/dL (values eyeballed from a 556 px rendered graph, not a published table). This is called out explicitly in both the in-code comment and the Bhutani tab footer, which also points clinicians to the AAP 2022 tab for actual phototherapy decisions. Spot-check: 41h of life, TSB 9.7 mg/dL Before: p75=9.33 → High-Intermediate Zone (wrong) After: p75=10.1 → 9.7 below p75, above p40 → Low-Intermediate ✓ No interpolation or decision logic changed — only the lookup data and its citation. |
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