Table 4 Coefficients for the main effect variables* in the APACHE IV multivariable regression model that predicts remaining intensive care unit (ICU) stay after day 5.

DAY 1

APS (per 10 units)

-0.37470

0.02

AIDS

0.76707

0.30

Cirrhosis

-0.69324

0.10

Hepatic Failure

-1.00013

0.02

Immunosuppression

-0.16578

0.41

Lymphoma

-0.79370

0.18

Leukemia or Myeloma

-1.22184

0.02

Metastatic Tumor

0.04277

0.89

Admitted from the Floor

0.02120

0.91

Admitted from the Operating/Recovery Room

-0.37637

0.63

Admitted from Other Hospital

-0.27897

0.27

Length of Stay before ICU Admission (per day)

-0.43308

0.22

Age (per 10 years)

-0.11960

0.41

(PaO₂ : F_iO₂ )/10 on Day 1 (per 10 units)

-0.00285

0.99

Emergency Surgery?

-0.37896

0.26

Ventilated on Day 1?

-1.59366

<0.01

Unable to Assess Glasgow Coma Score on Day 1?

-2.43030

<0.01

Rescaled Glasgow Coma Score on Day 1

-0.09905

<0.01

Day 1 ICU Length of Stay Prediction (per day)

0.84742

<0.01

Readmission to ICU?

0.18283

0.44

DIAGNOSTIC CATEGORIES (non-operative)

Airway obstruction

-0.36374

0.67

Aspiration pneumonia

-0.02422

0.96

Bacterial pneumonia

-0.60479

0.16

Cardiac arrest

-0.01874

0.97

Cardiogenic shock

0.91314

0.19

Congenstive heart failure

0.21795

0.63

Hyperglycemic hyperosmolar-nonketotic coma

-0.46909

0.52

COPD (emphysema/bronchitis)

-0.11881

0.81

Cardiovascular, other

0.72263

0.14

General, other

0.75895

0.19

GI bleeding, upper

-0.42147

0.34

GI, other

0.25619

0.64

Hepatic failure

-2.31722

<0.01

Hypovolemia/dehydration (not shock)

0.07455

0.92

Intracerebral hemorrhage

0.97105

0.04

Multiple trauma (excluding head trauma)

0.85690

0.10

Neurologic, other

0.46786

0.42

Drug overdose

-0.15812

0.80

Pancreatitis

0.06019

0.94

Pleural effusion

0.71845

0.37

Pulmonary edema (noncardiac, ARDS)

-1.15959

0.03

Pulmonary embolism

-0.35920

0.62

Renal, other

0.43602

0.49

Respiratory arrest

0.89615

0.07

Respiratory, other

0.47893

0.26

Rhythm disturbance

0.67577

0.26

Subarachnoid hemorrhage, intracranial aneurysm

1.46182

0.01

Subdural/epidural hematoma

-0.71143

0.31

Seizure (no structural disease)

-0.50347

.50

Sepsis, gastrointestinal

-0.25015

0.66

Sepsis, other location

-0.36255

0.53

Sepsis, pulmonary

-0.06425

0.90

Sepsis, unknown location

-0.49536

0.36

Sespsis, urinary tract

0.33721

0.56

Sepsis, cutaneous

-0.5287

0.51

Stroke

-0.59321

0.27

Head trauma with multiple other injuries

-0.55691

0.45

Head trauma only

1.79925

<0.01

DIAGNOSTIC CATEGORIES (post-operative)

Aortic aneurysm, elective repair

1.06657

0.24

GI malignancy

2.07196

0.04

CABG with single valve surgery

4.09432

<0.01

Craniotomy or transsphenoidal procedure, neoplasm

1.56513

0.14

Cardiovascular surgery, other

3.95827

<0.01

GI obstruction

0.79922

0.42

GI surgery, other

2.59499

<0.01

GI, perforation

1.47170

.12

GI, vascular ischemia

0.96945

0.35

Multiple trauma including the head

-0.41853

0.73

Multiple trauma excluding the head

1.88865

0.05

Neurologic surgery, other

2.64227

<0.01

Peripheral ischemia (embolectomy, thrombectomy, dilation)

1.95534

0.07

Respiratory surgery, other

2.24947

0.01

Thoracotomy, malignancy

2.98145

<0.01

Aortic aneurysm, rupture

-0.22531

0.84

Subarachnoid hemorrhage (aneurysm, arteriovenous malformation)

2.16347

0.06

Subdural/epidural hemtoma

0.67618

0.54

Head trauma only

-0.00303

0.99

Valvular heart surgery

3.21080

<0.01

DAY 5

APS taken on Day 5 (per 10 units)

0.75210

<0.01

Ventilated on Day 5?

2.22229

<0.01

Unable to Assess Glasgow Coma Score on Day 5?

3.94695

<0.01

(PaO₂ : F_iO₂ )/10 on Day 5 (per 10 units)

-0.96110

<0.01

Rescaled Glasgow Coma Score on Day 5

0.19615

<0.01

Delta APS Day 4 - APS Day 5 (per 10 units)

0.11160

<0.01