Klauber's Logistic Model for Severe Head Injury

The Klauber logistic model looks at several variables to obtain a probability of survival or death.

Variable	Value	Coefficient
Motor Component of the Glasgow Coma Scale	6	2.9351
	5	0.4732
	4	0.0798
	3	-0.5977
	2	-1.1875
	1	-1.7029
Number of reactive pupils	2	0.7244
	1	-0.4244
	0	-1.0540
	unknown	0.7540
systolic blood pressure	0 - 84 mm Hg	-0.5646
	85 - 174 mm Hg	0.6006
	175+ mm Hg	-0.0360
age in years	0-4	1.0043
	5-9	1.0988
	10-19	1.1644
	20-29	0.3832
	30-39	0.2555
	40-49	-0.0650
	50-59	-0.4149
	60-69	-0.2980
	70-79	-1.7619
	80+	-1.3667
presence of abdominal injury	yes	-0.3142
	no	0.3142
presence of chest injury	yes	-0.1995
	no	0.1995

probability of survival =

= (1 / (1 + (e ^ ((-1) * ((sum of coefficients) + (intercept))))))

probability of death = (1 - (probability of survival))

where:

• intercept = 0.1491

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Purpose: To use Klauber's logistic model to predict outcome for a comatose patient.