Table 5 The DSB, mortality, and operative events within 180 days between different score groups

Risk-identifying cohort

Endpoint

Score ≦ 2 (ref.)

Score > 2

OR

p

N=

2902

N=

2014

Delayed splenic bleeding

17

(0.6%)

44

(2.2%)

3.790 (2.159–6.653)

< 0.001*

Mortality event

0

0

N.A.

Operative events

17

(0.6%)

37

(1.8%)

3.176 (1.783–5.656)

< 0.001*

Time to Recur Median (IQR)Days

7 (16)

5.5(28)

0.961

Derivation group Performance:

ROC: AUC = 0.686,95%CI = 0.623–0.749, p < 0.001, Calibration (Hosmer-Lemeshow goodness-of-fit test) χ2 = 0.257 (p = 0.879)

Validation group

Endpoint

Score ≦ 2 (ref.)

Score > 2

OR

P

N=

718

N=

506

Delayed splenic bleeding

6

(0.8%)

13

(2.6%)

3.129 (1.181–8.289)

0.022*

Mortality event

0

0

N.A.

Operative events

6

(0.8%)

11

(2.2%)

2.637 (0.969–7.178)

0.058

Time to Recur Median (IQR)Days

5(3)

8(52)

0.831

Validation group performance

ROC: AUC = 0.650, 95%CI = 0.555–0.745, p = 0.025, Calibration (Hosmer-Lemeshow goodness-of-fit test) χ2 = 1.485 (p = 0.476)