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Table 1 Baseline characteristics

From: The volume-outcome relationship among severely injured patients admitted to English major trauma centres: a registry study

 Total
N = 47,157
Tertile 1,
volume ≤ 490,
N = 16,280
Tertile 2,
volume 491–574, N = 15,573
Tertile 3,
volume > 574,
N = 15,304
Number of MTCs281486
Age53 (32–74)56 (36–76)52 (31–72)53 (31–73)
Male33,072 (70.1%)11,224 (68.9%)11,056 (71.0%)10,792 (70.5%)
Penetrating injury1364 (2.9%)404 (2.5%)543 (3.5%)417 (2.7%)
ISS25 (17–29)25 (17–27)25 (18–29)25 (18–29)
NISS34 (25–50)34 (25–50)34 (26–50)34 (26–50)
GCS at arrival Emergency Department15 (14–15)15 (13–15)15 (14–15)15 (14–15)
Charlson Comorbidity Index0 (0–3)0 (0–4)0 (0–3)0 (0–4)
Intubation at Emergency Department12,256 (26.0%)3837 (23.6%)4313 (27.7%)4106 (26.8%)
Hypovolemic shock at Emergency Department (SBP < 90 mmHg)8662 (18.4%)2757 (16.9%)3203 (20.6%)2702 (17.7%)
AIS head ≥330,258 (64.2%)10,409 (63.9%)9822 (63.1%)10,027 (65.5%)
RTS7.84 (7.6–7.84)7.8 (7.6–7.84)7.8 (7.6–7.84)7.8 (7.8–7.84)
Referred patients15,118 (32.1%)5194 (31.9%)4577 (29.4%)5347 (34.9%)
Length of Stay10 (5–21)10 (5–20)11 (5–21)10 (5–22)
Critical Care Length of Stay0 (0–3)0 (0–3)0 (0–4)0 (0–3)
In-hospital mortality5876 (12.5%)2047 (12.6%)1937 (12.4%)1892 (12.4%)
  1. Continuous: median (IQR), categorical: N (%), New Injury Severity Score (NISS), Injury Severity Score (ISS), Abbreviated Injury Scale (AIS), Revised Trauma Score (RTS), Glasgow Coma Score (GSC)