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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