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Table 4 Estimated changes in coagulation function and CRP in AECOPD patients associated with PM10

From: Effect of urban air pollution on CRP and coagulation: a study on inpatients with acute exacerbation of chronic obstructive pulmonary disease

Variable

PM10

The day of hospitalization

The day before hospitalization

Two day before hospitalization

< 50 mg/L

≥ 50 mg/L

t

p

< 50 mg/L

≥ 50 mg/L

t

p

< 50 mg/L

≥ 50 mg/L

t

p

n = 158

n = 159

n = 142

n = 175

n = 133

n = 184

D dimer

0.69 ± 0.92

0.75 ± 1.17

0.524

0.601

0.68 ± 0.92

0.75 ± 1.13

0.608

0.544

0.73 ± 1.12

0.68 ± 0.87

0.430

0.667

TT

15.99 ± 3.63

16.41 ± 1.52

1.662

0.098

16.34 ± 2.13

16.04 ± 3.45

0.949

0.343

16.38 ± 2.72

15.95 ± 2.89

1.737

0.083

PT

12.33 ± 2.35

12.31 ± 1.73

0.125

0.900

12.48 ± 1.60

12.20 ± 2.48

1.163

0.242

12.36 ± 1.85

12.30 ± 2.32

0.272

0.786

FIB

4.05 ± 2.92

3.73 ± 1.39

1.275

0.203

4.25 ± 4.01

4.53 ± 4.30

0.599

0.550

4.21 ± 3.88

4.60 ± 4.47

0.821

0.412

APTT

27.94 ± 4.58

28.81 ± 3.96

1.815

0.070

28.61 ± 4.72

28.01 ± 4.05

1.218

0.224

28.55 ± 4.12

28.09 ± 4.53

0.922

0.357

CRP

10.17 ± 12.36

10.73 ± 11.87

0.411

0.681

8.84 ± 11.54

12.41 ± 12.52

2.637

0.009

9.86 ± 12.46

11.26 ± 11.58

1.017

0.310

  1. PM10, Particulate matter smaller than 10 µm in diameter; TT, Thrombin Time; PT, Prothrombin Time; FIB, Fibrinogen; APTT, Activated Partial Thromboplastin Time; CRP,C-reactive protein
  2. p-values are shown for the Student’s t-tests