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Table 4 Number and proportions of included patients with major trauma according to the different definitions and perceived triage precision

From: Calculating trauma triage precision: effects of different definitions of major trauma

Definition of major trauma Number of major trauma patients (% of total population) Perceived undertriage (%) with 95% CI Perceived overtriage (%) with 95% CI
ISS Traditional 470 (34.0) 23.4 (19.6 – 27.2) 66.9 (64.1 – 69.7)
ISS Extended 515 (37.2) 22.9 (19.3 – 26.5) 63.5 (60.7 – 66.4)
ISS Extensive 539 (38.9) 23.6 (20.0 – 27.1) 62.2 (59.3 – 65.0)
NISS Traditional 585 (42.3) 28.4 (24.7 – 32.0) 61.5 (58.6 – 64.4)
NISS Extended 629 (45.4) 27.7 (24.2 – 31.2) 58.2 (55.3 – 61.1)
NISS Extensive 641 (46.3) 27.8 (24.3 – 31.2) 57.5 (54.5 – 60.4)
Extended 132 (9.5) 12.9 (7.2 – 18.6) 89.4 (87.6 – 91.3)
Extensive 313 (22.6) 15.3 (11.3 – 19.3) 75.7 (73.1 – 78.2)