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Table 1 Patient characteristics and differences between groups of patients with good or poor outcome

From: Early EEG for outcome prediction of postanoxic coma: prospective cohort study with cost-minimization analysis

Characteristic

Good outcome

N = 187

Poor outcome

N = 197

P value

Female gender

46 (25%)

55 (28%)

0.6

Mean age (±SD)

60 ± 12

67 ± 12

<0.0001

OHCA

173 (93%)

172 (87%)

0.2

Cardiac etiology

165 (88%)

138 (70%)

<0.0001

VF rhythm

169 (90%)

114 (58%)

<0.0001

Patients treated with propofol

174 (93%)

171 (87%)

0.05

Mean propofol dose (mg/kg/h ± SD)

2.9 ± 1.6

3.2 ± 9.0

0.6

Patients treated with midazolam

74 (40%)

79 (40%)

1.0

Mean midazolam dose (μg/kg/h ± SD)

93 ± 65

112 ± 85

0.2

Patients treated with morphine

70 (37%)

61 (31%)

0.7

Mean morphine dose (μg/kg/h ± SD)

18 ± 13

21 ± 16

0.3

SSEP performed

39 (21%)

139 (71%)

<0.0001

Bilaterally absent SSEP at 72 hours

7 (4%)

65 (33%)

<0.0001

Unfavorable EEG at 24 hours

0/178 (0%)a

52/179 (29%)a

<0.0001

Favorable EEG at 12 hours

63/123 (51%)b

15/125 (12%)b

<0.0001

  1. EEG electroencephalography, Favorable EEG continuous pattern, diffusely slowed or normal, OHCA out of hospital cardiac arrest, SSEP somatosensory evoked potential, SD standard deviation, Unfavorable EEG isoelectric, low-voltage, or burst-suppression with identical bursts, VF ventricular fibrillation. aPatients who died within 24 hours of cardiac arrest or who had abundant artifacts on EEG are not included here. bPatients in whom EEG was started later than 12 hours after cardiacarrest or who had abundant artifacts on EEG are not included here