Table 3 comparison between success group and failure group

Age (mean ± SD, years)

65.90 ± 17.05

69.18 ± 15.45

NS

−7.89 to 14.45

 Female

33/65

5/45

 Male

18/35

6/55

NS

BMI (mean ± SD, kg/m²)

22.63 ± 6.18

21.91 ± 7.66

NS

−5.60 to 4.18

APACHE II score

18.29 ± 7.88

19.55 ± 2.34

NS

−3.58 to 6.08

 Neurological disease

8/15.7

2/18.2

0.838

0.22 to 6.59

 Septic shock

8/15.7

2/18.2

0.838

0.22 to 6.59

 Pneumonia

6/11.8

2/18.2

0.623

0.29 to 9.62

 Heart disease

6/11.8

2/18.2

0.623

0.29 to 9.62

 COPD exacerbation

3/5.9

1/9.1

0.694

0.15 to 17.00

 Post-operative conditions

19/37.3

2/18.2

0.305

0.07 to 1.92

TV (mean ± SD, ml.)

420.10 ± 207.48

370.91 ± 137.38

NS

− 82.17 to 180.55

VC (mean ± SD, L.)

1.01 ± 0.44

0.76 ± 0.34

NS

−0.05 to 0.54

RSBI

55.11 ± 25.02

83.84 ± 53.11

P <  0.01

−49.67 to −7.79

PI_MAX (mean ± SD, mmHg)

42.31 ± 17.17

32.50 ± 8.05

NS

−1.34 to 20.97

 Sodium (mmol/L)

135.86 ± 5.03

136.00 ± 6.21

NS

−3.63 to 3.35

 Potassium (mmol/L)

4.00 ± 0.57

3.46 ± 0.47

P <  0.01

0.17 to 0.92

 Bicarbonate (mmol/L)

23.54 ± 4.63

23.81 ± 4.11

NS

−3.29 to 2.75

 Magnesium (mmol/L)

1.97 ± 0.37

1.99 ± 0.43

NS

−0.32 to 0.28

 Phosphate (mmol/L)

4.92 ± 5.82

3.01 ± 0.56

NS

−2.58 to 6.38

 Calcium (mmol/L)

7.88 ± 0.63

8.06 ± 0.83

NS

−0.72 to 0.37

Albumin (g/dl)

25.29 ± 5.34

21.79 ± 6.26

NS

−0.72 to 7.72

Hematocrit (%)

32 ± 6

31 ± 4

NS

−4.79 to 2.58

 Right

13.7 ± 5.6

12.4 ± 10.0

NS

−0.31 to 0.56

 Left

13.5 ± 5.3

12.8 ± 09.6

NS

−0.35 to 0.48

 Right

1.27 ± 0.38

0.97 ± 0.43

P <  0.05

0.04 to 0.56

 Left

1.14 ± 0.37

0.85 ± 0.39

P <  0.05

0.04 to 0.54

 Right

1.01 ± 0.46

0.84 ± 0.66

NS

−1.61 to 5.00

 Left

1.05 ± 0.50

0.80 ± 0.48

NS

−0.84 to 5.82

 Right

36 ± 15

33 ± 24

NS

−15.05 to 7.37

 Left

37 ± 14

28 ± 13

NS

−18.16 to 0.65