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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)