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Table 2 Patients demographics and clinical characteristics

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

  Critical Illness Non-Critical Illness P Value
Number of patients (%) 356 (12.1) 2579 (87.9)  
Number of patients with imputed data (%) 52 (14.6) 414 (16.1)  
Age, years, median (IQR) 67 (56–77) 61 (47–74) < 0.01
Male sex, n (%) 200 (56) 1349 (52) 0.08
Initial pre-hospital vital signs, median (IQR)
 Oxygen Saturation, % 95 (88–98) 97 (95–98) < 0.01
 Respiratory rate breaths/minute 20 (14–27) 16 (14–20) < 0.01
 Systolic blood pressure, mmHg 140 (113–168) 140 (121–160) 0.29
 Heart rate, beats/minute 93 (74–111) 86 (73–102) < 0.01
 Glasgow Coma Scale score 15 (10–15) 15 (15–15) < 0.01
Diagnostic category by ambulance personnel, n (%)
 Neurological 128 (36) 740 (29)  
 Internal 111 (31) 881 (34)  
 Pulmonology 55 (15) 267 (10)  
 Cardiovascular 25 (7) 345 (13)  
 Surgical 11 (3) 96 (4)  
 Urological 6 (2) 50 (2)  
 Psychiatric/toxicologic 3 (< 1) 73 (3)  
 Medical (NOS) 17 (5) 127 (5)  
Pre-hospital interventions, n (%)
 Airway - noninvasive 157 (44) 446 (17) < 0.01
 Airway - endotracheal intubation 5 (1) 0 (0) < 0.01
 Physician staffed team 22 (6) 0 (0) < 0.01
General practitioner at scene, n (%) 61 (18) 404 (16) 0.26
Nursing Home before encounter, n (%) 51 (15) 264 (10) 0.01
  1. Abbreviations: IQR Interquartile Range, NOS not otherwise specified