Table 1 Hematological parameters of study participants by Mt5178 C/A genotype

Age (y)^a

54.5 ± 7.7

53.6 ± 7.8

0.243

Body mass index (kg/m²)^a

23.2 ± 2.8

23.5 ± 2.6

0.163

Red blood cell count (10⁴/μL)^a

480 ± 37

487 ± 41

0.066

Hematocrit (%)^a

43.8 ± 3.0

44.3 ± 2.8

0.092

Hemoglobin (g/dL)^a

15.0 ± 1.2

15.1 ± 1.0

0.199

Mean corpuscular volume (fl)^a

91.4 ± 4.3

91.2 ± 4.6

0.644

Mean corpuscular hemoglobin (pg)^a

31.2 ± 1.7

31.1 ± 1.7

0.487

Mean corpuscular hemoglobin concentration (g/dL)^a

34.2 ± 0.8

34.1 ± 0.8

0.529

White blood cell count (10²/μL)^b

56.8 ± 14.6

60.5 ± 18.3

0.026

Platelet count (10⁴/μL)^a

22.1 ± 4.8

22.6 ± 5.3

0.322

Coffee consumption (<1 cup per day/1 to 3 cups per day/≥4 cups per day) (%)^c

44.8/46.2/9.0

36.5/51.2/12.3

0.188

Current smokers (%)^c

42.1

41.8

0.944

Alcohol consumption (non- or ex-/occasionally/daily) (%)^c

18.4/35.0/46.6

12.9/40.0/47.1

0.269

Green tea consumption (<1 cup per day/1 to 4 cups per day/≥5 cups per day) (%)^c

22.6/41.3/36.1

20.0/45.3/34.7

0.689