APACHE II Score Death Rate Prediction

From the APACHE II score and knowledge of primary clinical diagnoses, an estimated risk of death in the hospital can be calculated.

X =

= (-3.517) + (0.146 * (APACHE II score)) + (0.603 if post-emergency surgery, 0 if not) + (diagnostic category weight)

estimated risk of hospital death =

= 1 / (1 + EXP((-1) * X)

Diagnostic Category - Nonoperative

Group	Disorder	Weight
respiratory failure or insufficiency	asthma or allergy	-2.108
	COPD	-0.367
	pulmonary edema, noncardiogenic	-0.251
	post-respiratory arrest	-0.168
	aspiration	-0.142
	poisoning or toxic	-0.142
	pulmonary embolus	-0.128
	infection	0
	neoplasm	0.891
cardiovascular failure or insufficiency	hypertension	-1.798
	rhythm disturbance	-1.368
	congestive heart failure	-0.424
	hemorrhagic shock or hypovolemia	0.493
	coronary artery disease	-0.191
	sepsis	0.113
	postcardiac arrest	0.393
	cardiogenic shock	-0.259
	dissecting aortic aneurysm	0.731
trauma	multiple trauma	-1.228
	head trauma	-0.517
neurologic	seizure disorder	-0.584
	ICH/SDH/SAH	0.723
other	drug overdose	-3.353
	diabetic ketoacidosis	-1.507
	GI bleeding	0.334
vital organ affected	metabolic or renal	-0.885
	respiratory	-0.890
	neurologic	-0.759
	cardiovascular	0.470
	gastrointestinal	0.501

Diagnostic Category - Operative

Group	Disorder	Weight
Operation	multiple trauma	-1.684
	chronic cardiovascular disease	-1.376
	peripheral vascular disease	-1.315
	heart valve surgery	-1.261
	craniotomy for neoplasm	-1.245
	renal surgery for neoplasm	-1.204
	renal transplant	-1.042
	head trauma	-0.955
	thoracic surgery for neoplasm	-0.802
	craniotomy for ICH/SDH/SAH	-0.788
	laminectomy or other spinal cord surgery	-0.699
	hemorrhagic shock	-0.682
	GI bleeding	-0.617
	GI surgery for neoplasm	-0.248
	respiratory insufficiency after surgery	-0.140
	GI perforation or obstruction	0.060
postoperative complications	sepsis	0.113
	postcardiac arrest	0.393
	postrespiratory arrest	-0.168
NOS	neurologic	-1.150
	cardiovascular	-0.797
	respiratory	-0.610
	gastrointestinal	-0.613
	metabolic renal	-0.196

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Purpose: To estimate the risk of an intensive care patient dying in the hospital based on the APACHE II score and clinical information.