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Table 3 The use of diagnostic tools and severity of illness (NACA-score) by level of response (Norwegian Medical Index) for the included 100 patients

From: Management of chest pain: a prospective study from Norwegian out-of-hours primary care

  Level of response
  Red Yellow Green Total
ECG taken?     
Yes 24 62 6 92
No 0 4 4 8
Total 24 66 10 100
Who ordered the ECG?     
Ambulance 9 5 0 14
Nurse at the casualty clinic 10 35 3 48
Physician at the casualty clinic 3 16 3 22
Both ambulance and casualty clinic 2 5 0 7
Unknown 0 1 0 1
Total 24 62 6 92
Any laboratory test taken?     
Yes 15 37 5 57
No 9 29 5 43
Total 24 66 10 100
Laboratory test (more than one possible)     
Oxygen-saturation 13 29 2 44
C-reactive protein 2 23 4 29
D-dimer 0 3 0 3
Other blood tests (glucose, haematology) 1 5 0 6
Severity of illness; 0 = no disease, 7 = dead     
NACA 0 1 0 0 1
NACA 1 1 18 5 24
NACA 2 4 18 3 25
NACA 3 3 20 1 24
NACA 4 10 9 1 20
NACA 5 4 1 0 5
NACA 6 1 0 0 1
NACA 7 0 0 0 0
Total 24 66 10 100