Table 2 Admission bioelectrical impedance vector analysis data, haemodynamics, oxygen exchange and biochemical data

BIVA data

 Hydration, %

71.0 (64.2–72.6)

73.5 (73.2–73.9)

85.2 (78.4–89.0)

<0.001

 Resistance/height, Ω/m

321 (249–348)

314 (257–351)

224 (188–267)

0.002

 Reactance/height, Ω/m

43.6 (40.7–58.9)

29.6 (26.4–33.9)

16.5 (11.5–20.4)

<0.001

 Phase angle, degrees

9.1 (7.3–10.3)

5.5 (5.2–6.3)

3.8 (3.0–4.4)

<0.001

Haemodynamic data

 Mean arterial pressure, mmHg

71 (67–76)

78 (70–92)

71 (67–78)

0.13

 Central venous pressure, mmHg

11 (8–12)

10 (8–12)

12 (10–14)

0.08

 Missing observations, n

3

9

0

 Noradrenaline, μg/min

3.5 (0–6)

0 (0–2)

6 (1–10)

0.04

Oxygen exchange

 FiO₂, %

0.40 (0.25–0.50)

0.30 (0.21–0.40)

0.30 (0.21–0.40)

0.28

 PaO₂, mmHg

82 (67–98)

105 (75–122)

82 (72–97)

0.07

 PaO₂/FiO₂ ratio, mmHg

249 (166–300)

334 (273–407)

316 (236–419)

0.06

Biochemical data

 Creatinine, μmol/L

72 (55–131)

70 (40–100)

116 (73–160)

0.03

 Missing observations, n

1

0

0

 Sodium, mmol/L

138 (134–142)

137 (135–140)

137 (135–139)

0.97

 Lactate, mmol/L

1.6 (1.1–2.2)

1.5 (1.1–2.4)

1.9 (1.4–2.5)

0.45