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Table 6 PM2.5 levels on the day before hospitalization associated with PT changes in AECOPD patients

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 before hospitalization

< 25 mg/L

F/t

p

≥ 25 mg/L

F/t

p

GOLD classes

 Moderate

12.57 ± 1.62

0.488

0.784

12.71 ± 1.10

9.683

0.008

 Severe

12.67 ± 3.37

  

12.05 ± 2.10

  

 Very severe

12.50 ± 1.76

  

11.75 ± 1.47

  

Age years

 < 65

12.01 ± 4.10

1.146

0.255

11.92 ± 2.03

0.627

0.531

 ≥ 65

12.81 ± 2.23

  

12.09 ± 1.83

  

Sex

 Female

12.36 ± 1.00

0.406

0.686

11.77 ± 1.81

0.924

0.357

 Male

12.67 ± 3.01

  

12.05 ± 1.88

  

BMI (kg/m2)

 < 18.5

11.35 ± 2.43

0.946

0.347

11.62 ± 1.09

1.213

0.226

 ≥ 18.5

12.69 ± 2.78

  

12.09 ± 1.97

  

Current smoker

 Yes

13.13 ± 3.70

0.450

0.654

12.01 ± 1.91

0.378

0.71

 No

12.60 ± 2.72

  

12.14 ± 1.79

  

Passive smoking

 Yes

12.46 ± 2.41

0.367

0.715

12.11 ± 1.75

0.392

0.695

 No

12.69 ± 2.93

  

12.00 ± 2.13

  

Use of statins

 Yes

13.49 ± 3.16

1.126

0.263

12.17 ± 1.71

0.441

0.659

 No

12.49 ± 2.70

  

12.00 ± 2.49

  

Inhaled corticosteroids

 Yes

12.67 ± 2.90

0.549

0.585

12.00 ± 1.76

0.570

0.569

 No

12.18 ± 1.44

  

12.20 ± 2.51

  

Comorbidities

 Hypertension

  Yes

13.11 ± 2.13

0.988

0.326

12.14 ± 1.40

0.603

0.547

  No

12.26 ± 3.11

  

11.98 ± 2.10

  

 Coronary heart disease

 Yes

13.16 ± 1.82

1.108

0.271

12.15 ± 2.31

0.549

0.584

 No

12.42 ± 3.01

  

11.99 ± 1.74

  

 Diabetes

 Yes

13.05 ± 1.51

0.581

0.563

12.34 ± 1.38

1.026

0.306

 No

12.55 ± 2.91

  

11.98 ± 1.96

  

 Asthma

 Yes

12.84 ± 1.05

0.243

0.809

11.64 ± 1.36

0.949

0.344

 No

12.59 ± 2.88

  

12.07 ± 1.93

  
  1. p-values are shown for the Kruskal–Wallis test or the Student’s t-test
  2. PM2.5, Particulate matter smaller than 2.5 µm in diameter; PM10, Particulate matter smaller than 10 µm in diameter; BMI, Body Mass Index; GOLD, Global Initiative for Chronic Obstructive Lung Disease