Factor Analysis Influencing Postoperative Hospital Stay and Medical Costs for Patients with Definite, Suspected, or Unmatched Diagnosis of Acute Cholecystitis according to the Tokyo Guidelines 2013

Table 6

Multivariate analyses of the factors influencing MC in the FFS system in the 171 patients who had definite, suspected, or unmatched AC diagnoses.

Variables	Regression coefficient	value
Age		0.0050
BMI		0.7263
PS		<0.001
CBD stone		0.7495
Acute cholangitis		0.6357
Preoperative biliary drainage		0.0320
Hospital stay before surgery		<0.001
Preoperative fasting period		0.0586
WBC		0.3568
Hb		0.4094
Plt		0.5015
CRP		0.7555
Alb		0.0197
BUN		0.7116
Cr		0.6605
T-Bil		0.7585
AST		0.3581
ALT		0.3973
ALP		0.0719
γ-GTP		0.5503
PT-INR		0.4562
Severity grade based on TG13		<0.001
B for the diagnosis of AC based on TG13		0.8311
C for the diagnosis of AC based on TG13		0.6437

MC: medical costs, FFS: fee for service, AC: acute cholecystitis, BMI: body mass index, PS: performance status, CBD: common bile duct, WBC: white blood cell, Hb: hemoglobin, Plt: platelet cell, CRP: C-reactive protein, Alb: albumin, BUN: blood urea nitrogen, Cr: creatinine, T-Bil: total bilirubin, AST: aspartate aminotransferase, ALT: alanine aminotransferase, ALP: alkaline phosphatase, γ-GTP: γ-glutamyl transpeptidase, PT-INR: prothrombin time-international normalized ratio, and TG13: Tokyo Guidelines 2013. and .