Manktelow et al reported a model for predicting survival of a very premature infant. The authors are from the University of Leicester in the UK.
Patient selection: white singleton infant born before 33 0/7 weeks gestation
(1) weeks of gestation at birth (with days expressed as a fraction per week)
(2) birthweight in kilograms
(4) birth before 24 0/7 weeks
0.46 * (weeks)
-0.47 / ((birthweight)^2)
birth before 24 0/7 weeks
value of X =
= SUM(points for the parameters) - 10.28
probability of survival =
= 1 / (1 + EXP((-1) * X))
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