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Table 1 Baseline characteristics of the intravascular and surface device patients

From: Intravascular versus surface cooling for targeted temperature management after out-of-hospital cardiac arrest – an analysis of the TTM trial data

Characteristic Intravascular n = 240 Surface device n = 694 p value
Age (years) 63 ± 12.7 64.5 ± 12.0 0.12
Male gender 190, 79% 567, 82% 0.39
Body mass index (kg/m2) 26.9 ± 5.0 27.0 ± 8.1 0.78
Bystander witnessed 212, 89% 623, 90% 0.64
Bystander CPR 162, 68% 518, 74% 0.04
Shockable rhythm 187, 78% 547, 79% 0.78
Time to CPR (minutes) 1 [0–2] 1 [0–2] 0.37
Time to ROSC (minutes) 25 [17-39] 25 [17-40] 0.73
Time collapse to randomization (minutes) 176 [125–227] 158 [114–210] 0.92
Baseline temperature on admission (°C) 35.2 ± 1.2 35.3 ± 1.2 0.19
GCS 4 [3-5] 3 [3-5] 0.31
Serum pH 7.20 ± 0.15 7.20 ± 0.16 0.65
Serum lactate (mmol/l) 6.3 ± 4.3 6.9 ± 4.5 0.07
Circulatory shock on admission 42, 18% 94, 14% 0.13
Coronary angiography 181, 75% 404, 58% 0.27
Haemodialysis on day 1 9, 4% 21, 3% 0.50
SOFA - C 3 [2-4] 3 [2-4] 0.26
  1. Values are mean ± SD, n,% or median [IQR] as appropriate
  2. Abbreviations: CPR cardiopulmonary resuscitation, ROSC return of spontaneous circulation, GCS Glasgow Coma Scale, SOFA - C Cardiovascular Sequential Organ Failure Assessment