This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

NICHD Extremely Preterm Birth Outcome Tool (22–25 weeks)

Survival probability of actively treated and of all extremely preterm infants from gestational age, birth weight, sex, multiple-birth status and steroids (Rysavy 2020) – with neurodevelopmental data

Details

Gestational age (completed weeks)

Birth weight (g)

Sex

male female

Singleton

Antenatal corticosteroids received

Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.

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Sources

Assessment of an updated Neonatal Research Network extremely preterm birth outcome model in the Vermont Oxford Network (JAMA Pediatr 174:e196294) Rysavy MA, Horbar JD, Bell EF, et al.; NICHD Neonatal Research Network and Vermont Oxford Network, 2020. Original paper (full text read; odds ratios Figure 1)
Extremely Preterm Birth Outcomes Tool – calculator and “About the Data” Eunice Kennedy Shriver National Institute of Child Health and Human Development, 2020. Official tool of the NICHD (coefficients from the calculator code, public domain; documented locally at data/quellen/nichd_epbo/)

Scientific basis last reviewed: September 2026.

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Note

Calculation aid for healthcare professionals. Percentiles and z-scores describe the position of a measured value in the reference population; clinical assessment remains with the treating physician.