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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%)