Table 1 Characteristics of the study population in relation to platelet levels

No. of participants

332

327

329

Age, years

73.6 ± 7.1

72.4 ± 7.3

71.6 ± 7.4

0.003

Gender of men, %

37.0

37.6

37.4

0.989

Body mass index (BMI), kg/m²

23.1 ± 3.6

23.3 ± 3.1

23.2 ± 3.2

0.776

Systolic blood pressure, mmHg

139 ± 18

139 ± 17

141 ± 19

0.179

Diastolic blood pressure, mmHg

80 ± 11

81 ± 11

82 ± 11

0.080

Current drinker, %

22.6

23.5

27.4

0.323

Current smoker, %

3.3

6.4

8.8

0.013

Serum triglycerides (TG), mg/dL

93 ± 54

108 ± 63

106 ± 53

0.001

Serum HDL cholesterol (HDLc), mg/dL

59 ± 16

60 ± 18

60 ± 15

0.565

Hemoglobin A1c (HbA1c), %

5.7 ± 0.5

5.6 ± 0.4

5.8 ± 0.6

0.002

Serum creatinine, mg/dL

0.78 ± 0.22

0.75 ± 0.19

0.73 ± 0.18

0.003

Platelets, × 10⁴/μL

16.6 ± 2.7

21.5 ± 1.4

27.7 ± 5.1

< 0.001