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Table 5 Estimated changes in coagulation function and CRP in AECOPD patients associated with PM2.5

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

Variable PM2.5
The day of hospitalization The day before hospitalization Two day before hospitalization
< 25 mg/L ≥ 25 mg/L t p < 25 mg/L ≥ 25 mg/L t p < 25 mg/L ≥ 25 mg/L t p
n = 228 n = 89 n = 228 n = 89 n = 220 n = 97
D dimer 0.75 ± 1.06 0.70 ± 1.01 0.384 0.702 0.68 ± 1.01 0.73 ± 1.03 0.690 0.399 0.69 ± 0.89 0.72 ± 1.08 0.249 0.804
TT 16.39 ± 3.47 16.13 ± 2.49 0.763 0.446 16.39 ± 2.39 16.13 ± 2.94 0.731 0.465 16.31 ± 2.24 16.16 ± 3.02 0.433 0.665
PT 12.41 ± 2.29 12.29 ± 2.07 0.450 0.653 12.61 ± 2.76 12.03 ± 1.89 2.052 0.041 12.42 ± 2.59 12.28 ± 1.90 0.550 0.583
FIB 4.33 ± 3.20 4.39 ± 4.45 0.110 0.912 4.55 ± 4.85 4.31 ± 3.83 0.466 0.642 4.29 ± 4.60 4.41 ± 3.93 0.246 0.806
APTT 27.97 ± 4.44 28.40 ± 4.35 0.770 0.442 28.13 ± 4.27 28.34 ± 4.42 0.703 0.382 28.36 ± 4.48 28.24 ± 4.32 0.229 0.819
CRP 10.52 ± 11.94 10.42 ± 12.19 0.066 0.947 8.27 ± 11.84 11.30 ± 12.13 2.008 0.046 9.33 ± 12.21 10.89 ± 12.02 1.060 0.290
  1. PM2.5, Particulate matter smaller than 2.5 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