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

Table 3 Correlation between concentrations of PM_2.5/PM₁₀ with coagulation function and CRP

Variable	The day of hospitalization				The day before hospitalization				Two day before hospitalization
	PM_2.5		PM₁₀		PM_2.5		PM₁₀		PM_2.5		PM₁₀
	R	p	r	p	r	p	r	p	r	p	r	p
D dimer	− 0.027	0.627	0.004	0.943	0.016	0.775	0.043	0.453	0.010	0.855	0.033	0.557
TT	− 0.077	0.173	− 0.014	0.412	− 0.094	0.098	− 0.058	0.301	− 0.097	0.087	0.018	0.703
PT	− 0.010	0.860	− 0.026	0.639	− 0.106	0.060	− 0.096	0.092	− 0.005	0.932	− 0.082	0.150
FIB	0.010	0.858	0.003	0.985	0.054	0.341	0.023	0.832	0.045	0.424	0.032	0.572
APTT	0.047	0.404	0.066	0.251	− 0.001	0.987	− 0.047	0.409	0.014	0.804	0.005	0.953
CRP	0.050	0.405	0.078	0.184	0.068	0.248	0.083	0.162	0.011	0.855	0.047	0.428

PM_2.5, Particulate matter smaller than 2.5 µm in diameter; 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
p-values are shown for the Pearson’s correlation analysis

ISSN: 1471-2466