The PredAHT (Predicting Abuse Head Trauma) is a clinical prediction tool that can aid in the diagnosis of abusive head trauma. The reduced regression model does not use 3 of the original 9 parameters.
Patient selection: age < 36 months with intracranial injury
Parameters:
(1) rib fractures
(2) long bone fractures
(3) retinal hemorrhages
(4) head and neck bruising
(5) apnea
(6) seizures
Parameter
Finding
Points
rib fractures
no
0
yes
3.8
long bone fractures
no
0
yes
2.621
retinal hemorrhages
no
0
yes
3.519
head or neck bruising
no
0
yes
1.451
apnea
no
0
yes
1.931
seizures
no
0
yes
1.624
value of X =
= SUM(points for all of the parameters) - 3.213
probability of abusive head trauma =
= 1 / (1 + EXP((-1) * X))
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