Table 2 The characteristics of patients without effusion, with bloody and non-bloody effusion

Total number

29

16

59

Age (y)

61.7 ± 14.6

63.4 ± 13.9

59.7 ± 14.2

0.18

0.24

Male

22 (75.9%)

11(68.7%)

36 (61.0%)

0.42

0.73

28-d mortality

2 (6.9%)

10 (62.5%)

6 (10.1%)

6.94 × 10⁻⁶

0.012

 Lung

11

7

30

0.51

0.25

 Abdominal

15

8

27

0.92

0.91

 Others

3

1

2

0.53

1.00

APACHE II

13 (11–17)

17 (12–19)

11 (9–15)

0.011

0.032

SOFA

7 (6–10)

9 (8–12)

3 (2–5)

0.0091

0.042

 Liver failure

4

5

3

0.12

0.25

 Renal failure

8

7

1

3.72 × 10⁻⁵

0.33

 Septic shock

7

3

1

0.0029

0.73

 ALI/ARDS

7

5

1

0.0011

0.73

 DIC

2

1

1

0.36

1.00

 RBC (×10¹²/L)

4.2 (3.6–7.8)

3.8 (3.6–7.9)

4.3 (3.6–4.7)

0.12

0.14

 Hg (g/L)

123.8 (116.2–143.2)

114.8 (109.6–121.7)

131.2 (107.1–145.6)

0.18

0.21

 PLT (×10¹²/L)

169.0 (126–180)

148.0 (113–167)

140.0 (96–230)

0.22

0.24

 PT (s)

16.0 (8–18)

18.0 (9–21)

13.0 (12–16)

0.09

0.15

 TT (s)

16.8 (9.2–19.3)

22.4 (12.1–25.2)

16.8 (14.8–17.9)

0.013

0.012

 APTT (s)

37.6 (29.4–43.2)

47.5 (36.8–56.6)

31.8 (27.9–38.7)

0.0078

0.011

 Fibrinogen (mg/dL)

426.6 (362.5–510.2)

369.4 (342.2–496.5)

391.0 (306.5–494.7)

0.022

0.020

 D-dimer (mg/L)

7.2 (6.3–10.8)

13.0 (8.45–11.2)

4.5 (1.8–11.5)

0.0010

0.0039

 Serum Albumin (g/L)

28 (24–32)

28 (26–31)

29 (25–36)

0.83

0.87

 CRP (mg/L)

100.9 (72.5–156.8)

131.2 (95.5–210.8)

84.7 (45.8–97.2)

6.79 × 10⁻⁵

0.021

 PCT (ng/mL)

18.2 (4.78–20.5)

22.6 (6.42–31.5)

2.25 (0.3–19.4)

5.89 × 10^− 5

0.031

 Proportion

1.02 (1.02–1.03)

1.02 (1.02–1.03)

0.86

 WBC number/mL

1517 (1340–2650)

2581 (2240–3415)

0.028

 RBC number/mL

1424 (1252–2145)

18,916 (15671–57,824)

0.0001

 LDH

716.0 (654–1055)

1867 (892–2162)

0.0031

 Albumen

19.5 (18.5–27.6)

27.0 (25.5–32.5)

0.021

 Glucose

8.5 (8.0–10.5)

9.2 (7.5–11.4)

0.16