Item

Control group (n = 87)

Study group (n = 19)

P value

age (year)

72.4 ± 7.8

72.8 ± 7.5

P > 0.05

males/females

1.52

1.54

P > 0.05

BMI (kg/m²)

21.24 ± 4.78

20.88 ± 5.05

P > 0.05

oxygenation index (mmHg)

185 ± 32

183 ± 35

P > 0.05

hemoglobin (g/L)

91 ± 5.6

89 ± 6.1

P > 0.05

APACHE II

18.7 ± 3.9

19.1 ± 4.3

P > 0.05

lactic acid (mmol/L)

1.34 ± 0.43

1.28 ± 0.48

P > 0.05