This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.
CRIB II – partial scores (no total score)
Clinical Risk Index for Babies II in preterm infants ≤ 32 weeks – gestational age × birth weight matrix not freely available
Why this calculator does not (yet) give a result
The points for the combination of sex, gestational age and birth weight (matrix in Lancet 2003, p. 1790) could not be transcribed completely and reliably from any freely accessible source. Without this matrix the total CRIB-II score (0–27) cannot be calculated – a partial score would be misleading. The points for admission temperature and base excess (below), the risk levels 0–5 / 6–10 / 11–15 / > 15 and the mortality model logit = −6.476 + 0.450 × CRIB II are documented (in each case from a secondary source).
Temperature on admission
| Range | Points |
|---|---|
| 36.1–37.5 °C | 0 |
| 34.5–36.0 or 37.6–39.1 °C | 1 |
| 32.9–34.4 or 39.2–40.7 °C | 2 |
| 31.3–32.8 or ≥ 40.8 °C | 3 |
| 29.7–31.2 °C | 4 |
| ≤ 29.6 °C | 5 |
Base Excess (first 12 hours of life)
| Range (mmol/l) | Points |
|---|---|
| ≥ 3 | 0 |
| −2 to 2 | 1 |
| −7 to −3 | 2 |
| −12 to −8 | 3 |
| −17 to −13 | 4 |
| −22 to −18 | 5 |
| −26 to −23 | 6 |
| < −26 | 7 |
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.
Frequently asked questions
CRIB II – partial scores (no total score): What does this calculator compute?
CRIB II (Parry 2003) estimates the mortality risk of very small preterm infants from sex, gestational age, birth weight, admission temperature and base excess. The point matrix for sex, gestational age and birth weight is published only in the original paper, which is not freely accessible; the calculator therefore shows what is documented and does not compute a total score.
CRIB II – partial scores (no total score): Which sources is this calculator based on?
Parry G, Tucker J, Tarnow-Mordi W; UK Neonatal Staffing Study Collaborative Group: CRIB II: an update of the clinical risk index for babies score (Lancet 361:1789–1791) (2003); Medical Data Models Portal, University of Münster: Clinical Risk Index for Babies II (CRIB II) – data model 28638 (reproduction of the temperature and base excess points according to Parry 2003, p. 1790) (2018)