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Table 2 Risk prediction of outcomes in EMS RETTS-A triage levels

From: Pre-hospital triage performance and emergency medical services nurse’s field assessment in an unselected patient population attended to by the emergency medical services: a prospective observational study

   High acuity Low acuity
Red Orange Yellow Green
nt 596 1588 1919 362
Time-sensitive condition n 153 193 116 11
AR 25.7 12.2 6.04 3.01
RR 3.10 1.25 0.43 0.27
CI [2.44,3.89] [0.99,1.57] [0.33,0.56] [0.09,0.50]
Deviating VS/complication within 48 h n 303 110 39 3
AR 50.8 6.92 2.03 0.83
RR 12.94 0.58 0.12 0.08
CI [10.5,16.5] [0.43,0.75] [0.08,0.18] [0.02,0.33]
Admission to in-patient care n 483 866 826 112
AR 81.0 54.5 43.0 30.9
RR 1.74 1.10 0.75 0.58
CI [1.62,1.86] [1.02,1.19] [0.69,0.81] [0.47,0.71]
48 h mortality n 22 18 4 0
AR 3.69 1.13 0.21 0
RR 6.49 1.25 0.13 0
CI [2.93,14.75] [0.52,2.81] [0.03,0.50] [0,0]
30-day mortality n 73 80 50 6
AR 12.8 5.04 2.6 1.66
RR 3.48 1.12 0.42 0.34
CI [2.41,4.88] [0.78,1.60] [0.27,0.62] [0.05,0.74]
  1. nt Total number of patients per triage level, n number of patients, AR absolute risk %, RR relative risk, CI Bootstrapped 99% confidence intervals