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Table 1 Baseline characteristics of patients by mean 7-day hemoglobin concentration

From: Association of hemoglobin concentration and mortality in critically ill patients with severe traumatic brain injury

Characteristic Hemoglobin P value
  <90 g/L
( n = 25)
90-99 g/L
(n = 61)
100-109 g/L
(n = 46)
≥110 g/L
(n = 37)
 
Age in years, mean (SD) 39 (19) 37 (18) 36 (18) 40 (15) 0.83
Male gender, number (percentage) 17 (68) 48 (80) 38 (83) 28 (76) 0.55
APACHE II score, mean (SD) 26 (5) 23 (4) 24 (5) 22 (4) 0.56
SBP <90 mm Hg, number (percentage) 6 (24) 10 (16) 9 (20) 7 (19) 0.87
PaO2 <70 mm Hg, number (percentage) 3 (12) 7 (11) 3 (7) 2 (5) 0.65
GCS score in 12 hours, median (IQR) 6 (5-7) 6 (6-7) 6 (5-7) 6 (6-7) 0.56
Mannitol, number (percentage) 9 (36) 31 (51) 26 (57) 19 (51) 0.14
CT of head, number (percentage)      
   Traumatic subarachnoid hemorrhage 17 (68) 31 (51) 21 (46) 21 (57) 0.32
   Diffuse axonal injury 12 (48) 21 (34) 9 (20) 9 (24) 0.07
   Subdural hematoma 11 (44) 24 (39) 17 (37) 14 (38) 0.95
   Features of increased ICP 10 (40) 31 (51) 26 (57) 20 (54) 0.60
   Basal skull fracture 3 (12) 19 (31) 12 (27) 8 (22) 0.29
Craniotomy performed, number (percentage) 8 (32) 19 (31) 23 (50) 15 (41) 0.22
  1. APACHE II, Acute Physiology and Chronic Health Evaluation II; CT, computed tomography, GCS, Glasgow Coma Scale; ICP, intracranial pressure; PaO2, arterial partial pressure of oxygen; SBP, systolic blood pressure; SD, standard deviation.