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Table 2 Characteristics for cases and controls

From: Association between acetylsalicylic acid and the risk of dialysis-related infections or septicemia among incident hemodialysis patients: a nested case–control study

Patients’ characteristics

Cases

Controls

P-value

N = 446

N = 4126

 

Age (years)

66.5 ± 12.8

68.1 ± 10.8

0.01

Female sex (%)

42.4

40.8

0.52

Race (%)

   

 Black

6.0

4.1

0.16

 Caucasian

84.5

86.1

 

 Other

9.4

9.8

 

 BMI (kg/m2)

27.8 ± 6.3

27.4 ± 6.3

0.29

 Smoking (%)

15.5

14.1

0.41

Co-morbidities (%)

   

 Cardiovascular disease

57.9

58.2

0.87

 Cerebrovascular disease

17.7

16.3

0.46

 Chronic pulmonary disease

32.5

30.0

0.27

 Chronic liver disease

2.2

3.1

0.33

 Congestive heart failure

37.4

37.8

0.89

 Diabetes

57.9

53.1

0.05

 Hyperlipidemia

58.3

58.7

0.87

 Hypertension

94.8

94.1

0.52

 Malignancy

17.7

16.7

0.60

 Peripheral vascular disease

37.4

36.7

0.75

ASA daily dose

   

 Unexposed

50.7

49.3

0.79

 80-324 mg

35.7

37.3

 

 ≥ 325 mg

13.7

13.4

 

Other medication use (%)

   

 Anticoagulant

28.9

21.2

>0.001

 Antiplatelet

11.0

11.8

0.63

Laboratory data

   

 Albumin (g/L)

33.2 ± 6.6

33.9 ± 6.5

0.09

 eGFR (ml/min•1.73 m2)

9.0 ± 3.7

9.1 ± 4.0

0.65

 Hemoglobin (g/L)

10.2 ± 1.8

10.5 ± 1.8

0.01

  1. Units conversion: Albumin, divide by 10 to convert g/L to g/dL; Hemoglobin, divide by 10 to convert g/L to g/dL
  2. BMI body mass index; eGFR estimated glomerular filtration rate