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Table 3 Characteristics of patients by adverse event status

From: The impact of adverse events in the intensive care unit on hospital mortality and length of stay

Characteristics Patients with AE Patients without AE P value
N 40 167  
Female – no. (%) 17 (42.5) 58 (34.7) 0.36
age – median yr. (25th – 75th %ile) 65 (53–75) 66 (55–76) 0.61
Glasgow coma scale – median (25th – 75th %ile) 7 (5–10) 8 (6–11) 0.07
Probability of death – median % (25th – 75th %ile)* 0.34 (0.17–0.70) 0.31 (0.12–0.62 0.45
Charlson Index – no. (%)    0.49
   0 11 (27.5) 51 (30.5)  
   1 18 (45.0) 74 (44.3)  
   2 10 (25.0) 29 (17.4)  
   3 1 (2.5) 13 (7.8)  
Admitting Service – no. (%)    0.76
   Medicine 15 (37.5) 71 (42.5)  
   Surgery 25 (62.5) 96 (62.5)  
Diabetes – no. (%)    0.16
   without end organ damage 1 (2.5) 18 (10.8)  
   With end organ damage 3 (7.5) 6 (3.6)  
Indication for ICU admission – no. (%)    0.09
   Medical reasons 21 (52.5) 110 (65.9)  
   Post-op (scheduled) 5 (12.5) 28 (16.8)  
   Trauma 7 (17.5) 17 (10.2)  
   Post-op (unscheduled) 7 (17.5) 12 (7.2)  
Ventilation required in first 24 hrs – no. (%) 36 (90) 131 (78.4) 0.09
Location prior to ICU admission – no. (%)    0.70
   Emergency department 14 (35) 65 (38.9)  
   Operating room 11 (18.3) 49 (29.3)  
   Hospital floor 7 (17.5) 24 (14.4)  
   Outside hospital 3 (7.5) 16 (9.6)  
   Other 3 (7.5) 4 (2.4)  
   Intermediate care 2 (5.0) 9 (5.4)  
  1. *Probability of death calculated according to the New Simplified Acute Physiology Score [7].
  2. ICU = Intensive Care Unit; AE = Adverse event; Intermediate care = Medical and surgical step down units and the Post-anaesthetic care unit.
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