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Table 4 Observed 6-month and 28-day mortality rates for the derivation, geographic and temporal external validation sub-cohorts, stratified by FP score interval

From: Derivation and validation of a prognostic model for postoperative risk stratification of critically ill patients with faecal peritonitis

Cohort

Derivation (UK until Jan 2011)

Geographic validation (non-UK)

Temporal validation (UK post-Jan 2011)

FP score

Deceased

Deceased

Deceased

6-month mortality

 0–2

3 (3.7%)

14 (13.7%)

5 (6.3%)

 >2–4

11 (10.8%)

25 (22.5%)

7 (10.5%)

 >4–6

14 (20%)

29 (36.3%)

12 (26.1%)

 >6–12

29 (31.9%)

44 (40.7%)

15 (28.9%)

 >12

67 (57.3%)

73 (64%)

22 (59.5%)

28-day mortality

 0–2

0 (0%)

10 (9.9%)

2 (2.7%)

 >2–4

8 (8.3%)

12 (12%)

3 (5.4%)

 >4–8

10 (9.5%)

17 (15.3%)

8 (11.1%)

 >8–16

14 (16.5%)

27 (26.2%)

12 (22.2%)

 >16

47 (45.6%)

42 (42%)

15 (22.4%)