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Table 4 Regression task

From: Computerized prediction of intensive care unit discharge after cardiac surgery: development and validation of a Gaussian processes model

 

Actual

GP (4 h)

EuroSCORE (4 h)

EuroSCORE vs. GP

Nurses (6 h)

Nurses vs. GP

ICU physicians (6 h)

ICU physicians vs. GP

Validation cohort, n = 499

   LOS: Median (P25-P75)(days)

3 (2-5)

3 (2-3)*

4 (3-5)*

p < 0.001

X

X

X

X

   LPF: Median (P25-P75)

X

0 (0-0.4)

-0.3 (-0.5-0)

p = 0.003

X

X

X

X

   Patients with LPF = 0: n(%)

X

200 (40)

94 (19)

P < 0.001

X

X

X

X

   RMSRE

X

0.408

0.643

 

X

X

X

X

Nurses answer ≤ 6 h, n = 396

   LOS: Median (P25-P75)(days)

3 (2-4)

3 (2-3)*

4 (3-5)*

p < 0.001

3 (2-3)*

p = 0.012

X

X

   LPF: Median (P25-P75)

X

0 (0-0.4)

-0.3 (-0.5-0)

p = 0.002

0 (0-0.3)

p = 0.567

X

X

   Patients with LPF = 0: n(%)

X

181 (46)

86 (22)

P < 0.001

152 (38)

P = 0.044

X

X

   RMSRE

X

0.389

0.635

 

0.522

 

X

X

Physicians answer ≤ 6 h, n = 159

   LOS: Median (P25-P75)(days)

3 (2-5)

3 (2-3)*

4 (4-5)*

p < 0.001

X

X

3 (2-3)*

p = 0.578

   LPF: Median (P25-P75)

X

0.2 (0-0.5)

-0.25 (-0.5-0.2)

p < 0.001

X

X

0.2 (0-0.4)

p = 0.755

   Patients with LPF = 0: n(%)

X

59 (37)

27 (17)

p < 0.001

X

X

49 (31)

P = 0.234

   RMSRE

X

0.439

0.631

 

X

X

0.612

 
  1. *p-value < 0.001 (as compared to actual LOS)
  2. LOS= Length of stay
  3. LPF= Loss Penalty Function
  4. RMSRE= Root Mean Squared Relative Error
  5. The interpretation of the different validation measures can be found in the methodology section.