Table 2 Comparison of clinical characteristics of ARDS patients according to survival status. Normally distributed quantitative data are expressed as means±standard deviation. Non-normally distributed quantitative data are expressed as medians (IQR)

Age,years

56.96 ± 17.09

50.16 ± 14.33

Sex,male/female,n

76/45

54/26

BMI,kg/m²

23.41 ± 3.88

24.69 ± 3.93

APACHE II score

14.96(14 to 16)

13.51 (13 to 15)

SOFA score

5.42 (5 to 6)

4.15 (4 to 5)

PaO₂/FiO₂,mmHg

115 (102 to 188)

135 (115 to 154)

CRP,mg/L

152.20 (126.50 to 177.89)

146.32 (113.27 to 179.37)

PCT,ng/Ml

13.67 (5.49 to 21.89)

11.30 (6.90 to 15.70)

Hemoglobin,g/L

105.63 ± 27.68

110.41 ± 30.74

Albumin,g/L

27.24 ± 5.68

28.33 ± 6.02

Leukocytes,10⁹/L

12.19 (10.41 to 13.97)

10.80 (9.47 to 12.14)

Lymphocytes,10⁹/L

1.03 (0.86 to 1.20

1.21 (0.92 to 1.50)

Neotrophils,10⁹/L

9.80 (8.29 to 11.31)

8.80 (7.64 to 9.95)

Lymphocyte/Neotrophil ratio

0.15 ± 0.05

0.20 ± 0.28

Virus infection

12(9.91%)

11(13.75%)

 IgG,g/L

9.95 ± 2.37

12.42 ± 3.88

 IgA,g/L

1.80 ± 0.53

2.29 ± 1.04

 IgM,g/L

0.90 ± 0.25

1.22 ± 0.33

 IgE,ng/mL

351.97 ± 80.27

1030.29 ± 220.94

 C3

3.27 ± 0.91

10.31 ± 2.06

 C4

1.84 ± 0.46

0.25 ± 0.10

 CD3+ cells,%

61.90 ± 15.49

63.83 ± 15.29

 CD4+ cells,%

33.93 ± 16.06

36.67 ± 14.93

 CD4+ cell count (PCS/μl)

328.85 ± 72.23

487.86 ± 65.04

 CD8+ cells,%

29.47 ± 5.42

24.38 ± 9.75

 CD8+ cell count (PCS/μl)

152.75 ± 22.66

331.50 ± 95.71

 CD4+/CD8+ ratio

1.79 ± 0.09

1.78 ± 0.12

 B-lymphocyte cells,%

29.81 ± 8.89

31.33 ± 5.49

 B-lymphocyte cell count (PCS/μl)

113.27 ± 29.45

601.33 ± 52.26

 NK cells,%

9.19 ± 3.28

8.00 ± 1.67

 NK cell count (PCS/μl)

56.55 ± 12.87

91.17 ± 19.79