Predicting Outcomes for Interhospital Transferred Patients of Emergency General Surgery

Table 1

List of all variables included in regression models.

Variables	Classification
Forward selection multivariable logistic regression—mortality
Age—each year	Cont.
Sex—male	Cat.
PMHx—CHF	Cat.
PMHx—dialysis	Cat.
PMHx—any kidney disease	Cat.
PMHx—any liver disease	Cat.
PMHx—DM	Cat.
PMHx—HTN	Cat.
Diagnosis—appendicitis	Cat.
Diagnosis—bowel ischemia	Cat.
Diagnosis—bowel obstruction	Cat.
Diagnosis—bowel perforation	Cat.
Diagnosis—fistula	Cat.
Diagnosis—GI bleeding	Cat.
Diagnosis—hernia	Cat.
Diagnosis—intra-abdominal infection	Cat.
Diagnosis—liver or gallbladder infection	Cat.
Diagnosis—pancreatitis	Cat.
Procedure type—endoscopy	Cat.
Procedure type—I&D	Cat.
Procedure type—laparoscopic	Cat.
Procedure type—laparotomy	Cat.
Procedure type—percutaneous intervention by IR	Cat.
Open abdomen—yes	Cat.
Total SOFA score—each point	Cont.
Lactate hypoperfusion—yes	Cat.
EBL—each mL	Cont.
Fluid in OR—each mL	Cont.
Unit—transferred from ED	Cat.
Unit—transferred from ICU	Cat.
Unit—transferred from other inpatient units	Cat.
Both multivariable ordinal logistic regressions—HLOS + disposition
Age—each year	Cont.
Sex—male	Cat.
PMHx—CHF	Cat.
PMHx—dialysis	Cat.
PMHx—any kidney disease	Cat.
PMHx—any liver disease	Cat.
PMHx—DM	Cat.
PMHx—HTN	Cat.
Diagnosis—appendicitis	Cat.
Diagnosis—bowel ischemia	Cat.
Diagnosis—bowel obstruction	Cat.
Diagnosis—bowel perforation	Cat.
Diagnosis—fistula	Cat.
Diagnosis—GI bleeding	Cat.
Diagnosis—hernia	Cat.
Diagnosis—intra-abdominal infection	Cat.
Diagnosis—liver or gallbladder infection	Cat.
Diagnosis—pancreatitis	Cat.
Procedure type—endoscopy	Cat.
Procedure type—I&D	Cat.
Procedure type—laparoscopic	Cat.
Procedure type—laparotomy	Cat.
Procedure type—percutaneous intervention by IR	Cat.
Open abdomen—yes	Cat.
Total SOFA score—each point	Cont.
Lactate hypoperfusion—yes	Cat.
EBL—each mL	Cont.
Fluid in OR—each mL	Cont.
Unit—transferred from ED	Cat.

Cat.: categorical variable; CHF: congestive heart failure; Cont.: continuous variable; DM: diabetes mellitus; ED: emergency department; EBL: estimated blood loss; GI: gastrointestinal; HLOS: hospital length of stay; HTN: hypertension; I&D: incision and drainage; ICU: intensive care unit; IR: interventional radiology; mL: milliliter; OR: operating room; PMHx: past medical history; and SOFA: Sequential Organ Failure Assessment.