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Table 1 Patient characteristics

From: Supplemental oxygen delivery to suspected stroke patients in pre hospital and emergency department settings

  No suppl. oxygen (n=57) Low-flow oxygen (n=70) High flow oxygen (n=23) P value
Age 65.3±15.6 73.6±13.3 65.5±16.5 0.003
Males 26 (46%) 25 (36%) 4 (17%) 0.06
Symptom onset to ED time     
 Less than 3 hrs 17 (30%) 30 (43%) 11 (48%)  
 More than 3 hrs 25 (44%) 17 (24%) 2 (9%) 0.02
 Unknown 15 (26%) 23 (33%) 10 (43%)  
Initial GCS score     
 0-8 1 (2%) 6 (9%) 8 (35%)  
 9-15 53 (93%) 57 (81%) 12 (52%) <0.001
 Missing 3 (5%) 7 (10%) 3 (13%)  
Inpatient admission 44 (77%) 67 (96%) 22 (96%) 0.002
Intubation 0 (0%) 0 (0%) 17 (74%) <0.001
Discharge destination     
 Home 25 (44%) 24 (34%) 3 (13%)  
 Rehab/Dead 22 (39%) 33 (47%) 15 (65%) 0.13
 Unknown 10 (18%) 13 (19%) 5 (22%)  
Final Diagnosis     
 AIS or TIA 22 (39%) 35 (50%) 3 (13%)  
 Hemorrhagic stroke 2 (4%) 6 (9%) 8 (35%)  
 HIE or Seizures 4 (7%) 4 (6%) 8 (35%) <0.001
 Toxic/metabolic 18 (32%) 17 (24%) 3 (13%)  
 Miscellaneous 11 (19%) 8 (11%) 1 (4%)  
Adverse Events*     
 None 43 (75%) 46 (66%) 10 (44%)  
 Present 6 (11%) 13 (19%) 8 (35%) 0.07
 Unknown 8 (14%) 11 (16%) 5 (22%)  
Specific Adverse Events     
 Mortality 2 (4%) 5 (7%) 4 (17%) 0.2
 Seizures 2 (4%) 4 (6%) 1 (4%) 0.9
 New neurological deficit 4 (7%) 6 (9%) 2 (9%) 0.9
 New infarction 1 (2%) 1 (1%) 1 (4%) 0.8
 Post-ischemic hemorrhage 2 (4%) 6 (9%) 1 (4%) 0.7
  1. *None of the adverse events occurred in patients discharged from the ED.
  2. Abbreviations: ED emergency department, GCS Glasgow Coma Scale, AIS acute ischemic stroke, TIAtransient ischemic attack, HIE hypoxic-ischemic encephalopathy.