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Table 2 Correlation analysis of variables and clopidogrel low response.

From: Comparison of VerifyNow-P2Y12 test and Flow Cytometry for monitoring individual platelet response to clopidogrel. What is the cut-off value for identifying patients who are low responders to clopidogrel therapy?

Variables

Low Responder patients*

N = 6

Intermediate plus High Responder patients*

N = 46

P value

Age

62 ± 13.2

64 ± 10.7

0.671

Male

4 (66)

35 (76)

0.472

Body mass index, kg/m2

26 ± 3.3

26 ± 4.3

0.956

Ejection fraction %

54 ± 3.7

52 ± 9.6

0.652

Hematocrit %

36.2 ± 7.8

37 ± 8

0.774

Platelet count (× 103/μL)

268 ± 124

235 ± 130

0.439

Current smoking

1 (17)

4 (87)

0.487

Diabetes

1 (17)

13 (29.5)

0.663

-Insulin dependent Diabetes

0

6 (15)

0.444

Chronic renal failure

0

2 (43)

0.772

Hypertension

3 (50)

29 (63)

0.369

Hypercholesterolemia

3 (50)

28 (61)

0.412

Statins

6 (100)

32 (70)

0.136

CYP3A4-metabolizing statins

5 (83)

23 (50)

0.134

  1. Values are expressed as means ± SDs or number (percentages) of patients.
  2. *Defined by flow cytometric evaluation of platelet activation parameters.