# Table 4

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

*p-value < 0.001 (as compared to actual LOS)

LOS= Length of stay

LPF= Loss Penalty Function

RMSRE= Root Mean Squared Relative Error

The interpretation of the different validation measures can be found in the methodology section.

Meyfroidt et al. BMC Medical Informatics and Decision Making 2011 11:64   doi:10.1186/1472-6947-11-64