Table 2 Basic demographics of the 12-year helicopter emergency medical service (HEMS) dataset (percentage calculated from total number of cases (n = 1255))

Trauma category (n = 1255)

1097 blunt

(87.4%)

100 penetrating

(8.0%)

55 other (4.6%)

NACA category (n = 1255)

674 NACA 4

(53.7%)

361 NACA 5

(28.8%)

114 NACA 6

(9.1%)

106 NACA 7

(8.4%)

RTS category (n = 1198)

202 RTS < 4

(16.1%)

996 RTS > 4

(79.4%)

GCS category (n = 1194)

353 GCS 3-8

(28.1%)

841 GCS 9-15

(67.0%)

Type of response (n = 1255)

721 helicopter

(57.5%)

534 RRV

(42.5%)

Physician status (n = 1254)

205 resident

(16.3%)

1049 consultant

(83.6%)