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Table 2 Baseline characteristicsa

From: Balanced versus chloride-rich solutions for fluid resuscitation in brain-injured patients: a randomised double-blind pilot study

Characteristics

Intention-to-treat population

TBI patients

 

Saline ( N = 21)

Balanced ( N = 20)

Saline ( N = 18)

Balanced ( N = 18)

Age (years), median (IQR)

51 (25 - 68)

49 (26 - 75)

47 (28-57)

49 (27-77)

Male, N (%)

15 (71)

17 (85)

13 (72)

16 (89)

Diagnosis, N (%)

    

Traumatic brain injury

19 (90)

18 (90)

/

/

Subarachnoid haemorrhage

2 (10)

2 (10)

  

Glasgow Coma Scale score on scene, median (IQR)

8 (7 - 9)

7 (6 - 9)

7 (6-8)

7 (6-8)

Surgical procedures, N (%)

    

Haematoma/contusion evacuation

9 (43)

4 (20)

8 (44)

4 (22)

Extraventricular drainage

2 (10)

2 (10)

0

0

Transfusion, median (IQR)

    

Red blood cells, units

4 (19)

3 (15)

4 (22)

3 (17)

Fresh frozen plasma, units

3 (14)

0

3 (17)

0

Norepinephrine infusion on admission, N (%)

8 (38)

7 (35)

7 (39)

7 (39)

Fluid infusion prior to inclusion, median (IQR)

    

Crystalloids (NaCl 0.9%), ml

1000 (500 -1000)

1000 (500 - 1500)

500 (500 -1000)

1000 (500 -1500)

Colloids, ml

0 (0 - 500)

0 (0 - 500)

0 (0 - 500)

0 (0 - 500)

Time from brain injury to inclusion (hours) median (IQR)

5 (3 - 7)

5 (4 - 12)

4 (3-6)

5 (4-6)

Biological status upon inclusion

    

Hyperchloraemic acidosis, N (%)

4 (19)

2 (10)

4 (22)

2 (11)

Osmolarity (mOsm/L), median (IQR)

303 (295 - 319)

302 (296 - 319)

306 (299-328)

306 (300-319)

Natraemia (mmol/L), median (IQR)

140 (138-142)

139 (137-141)

140 (138-141)

139 (137-141)

Chloraemia (mmol/L), median (IQR)

106 (104 - 110)

106 (101 - 107)

106 (104-111)

106 (100-107)

Kalemia (mmol/L), median (IQR)

3.6 (3.4 - 3.9)

3.7 (3.5 - 4.1)

3.7 (3.4-3.9)

3.7 (3.5-4.1)

Ionized calcaemia (mmol/L), median (IQR)

1.10 (1.07 - 1.14)

1.11 (1.07 - 1.18)

1.10 (1.08-1.12)

1.11 (1.06-1.18)

Magnesemia (mmol/L), median (IQR)

0.86 (0.72 - 0.95)

0.81 (0.75 - 0.88)

0.82 (0.76-0.92)

0.83 (0.73-0.92)

Phosphoremia (mmol/L), median (IQR)

0.86 (0.67 - 1.07)

0.85 (0.74 - 1.14)

0.88 (0.70-1.10)

0.82 (0.73-1.13)

Lactataemia (mmol/L), median (IQR)

1.4 (1.1 - 2.1)

1.7 (1.1 - 2.7)

1.5 (1.2-2.2)

2.0 (1.1-2.7)

Azotaemia (μmol/L), median (IQR)

66 (56-73)

67 (58-71)

65 (56-72)

67 (60-71)

Albuminaemia (g/L), median (IQR)

36 (32 - 41)

37 (34 - 39)

34 (32-41)

36 (34-39)

pH, median (IQR)

7.38 (7.33 - 7.44)

7.39 (7.32 - 7.45)

7.36 (7.31-7.41)

7.39 (7.31-7.45)

SID (mmol/L), median (IQR)

39 (35 - 42)

39 (39 - 41)

40 (37-41)

39 (37-41)

  1. aIQR: interquartile range; TBI: traumatic brain injury; Strong Ion Difference (SID) = (Na + K + Ca + Mg) - (Cl + lactate).