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Table 4 Confusion matrix of trauma incidents with dispatch of primary missions:

From: Dispatch accuracy of physician-staffed emergency medical services in trauma care in south-east Norway: a retrospective observational study

2015

Incident

Total (%)

Complex

Non-complex

Dispatch

P-EMS

A

B

 

506–663 (2.7–3.5%)

1843–2000 (9.7–10.5%)

2506 (13.2%)

GEMS

C

D

 

641–798 (3.4–4.2%)

15,724–15,881 (82.6–83.5%)

16,522 (86.8%)

Total (%)

1147–1304 (6.0–6.9%)

17,724–17,881 (93.2–94.0%)

19,028 (100.0%)

  1. P-EMS physician-staffed emergency medical services, GEMS ground emergency medical services, Undertriage: C/(A + C), Overtriage: B/(A + B)