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Table 4 Multivariate ordered logistic regression analysis for ICDSC score

From: Risk factors for postoperative delirium on oxygen delivery-guided perfusion

Variable

Coefficient

Standard error

Chi-Square

P value

Model 1

BSA (m2)

0.84

1.27

0.44

0.508

Diabetes

− 0.52

0.33

2.47

0.116

Preoperative Hct (%)

− 0.05

0.05

1.07

0.301

Euro SCORE II

− 0.11

0.07

2.91

0.088

Median PI (L/min/m2)

− 2.09

1.42

2.16

0.141

Number of RBC units transfused (u)

− 0.12

0.08

2.05

0.153

Blood glucose (mg/dL)

− 0.00

0.01

0.04

0.526

Sodium (mEq/L)

− 0.01

0.06

0.01

0.907

Time < Hct25 (min)

− 0.01

0.00

5.51

0.019

Overall model fit

 

AIC = 217.7

 

0.002

Model 2

Age (years)

− 0.01

0.02

0.36

0.547

Diabetes

− 0.23

0.28

0.65

0.419

Previous TIA/CVA

0.21

0.25

0.76

0.384

eGFR (mL/min/1.73m2)

0.00

0.01

0.07

0.789

Preoperative albumin (g/dL)

− 0.65

0.53

1.50

0.220

Number of RBC units transfused (u)

− 0.16

0.07

5.56

0.018

Intubation time (h)

− 0.05

0.02

4.64

0.031

Time < Hct25 (min)

− 0.01

0.00

5.88

0.015

Systolic blood pressure (mmHg)

0.01

0.01

1.22

0.269

Blood glucose (mg/dL)

− 0.01

0.01

1.73

0.189

Sodium (mEq/L)

− 0.00

0.05

0.00

0.991

Overall model fit

 

AIC = 244.1

 

0.003

  1. Results of the multivariate ordered logistic regression are given as coefficient, standard error, and chi-square. As multivariate ordered logistic regression analyses for the ICDSC score, Model 1 incorporated nine significant variables to identify independent predictors of delirium, Model 2 incorporated time < Hct25 that was independent predictor in model 1 together with previously reported independent risk factors