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Table 1 Variables according to the risk stratification model by Seymour, et al

From: A pre-hospital risk score predicts critical illness in non-trauma patients transported by ambulance to a Dutch tertiary referral hospital

Model variable  
  Point scores
Age, years
 < 45 0
 45 to 64 1
 ≥ 65 1
Systolic blood pressure, mmHg
 ≤ 90 1
 91 to 140 0
 141 to 180 0
 > 180 0
Heart rate, beats per minute
 ≤ 60 0
 61 to 99 0
 100 to 119 0
 ≥ 120 1
Respiratory rate, breaths per minute
 < 12 1
 12 to 23 0
 24 to 35 1
 ≥ 36 2
Oxygen saturation, %
 ≥ 93 0
 88 to 92 0
 80 to 87 1
 < 80 1
Glasgow Coma Scale score
 15 0
 12 to 14 1
 8 to 11 1
 < 8 2