| Coffee consumption | P for trend | ||
---|---|---|---|---|
 | <1 cup per day | 1 to 3 cups per day | ≥4 cups per day |  |
Mt5178C | N = 119 | N = 123 | N = 24 |  |
Red blood cell count (104/μL) | 480 ± 3 | 481 ± 3 | 468 ± 8 | 0.349 |
Red blood cell count (104/μL)a | 484 ± 3 | 480 ± 3 | 463 ± 7* | 0.022 |
Hematocrit (%) | 43.9 ± 0.3 | 43.8 ± 0.3 | 43.1 ± 0.6 | 0.426 |
Hematocrit (%)a | 43.9 ± 0.3 | 43.5 ± 0.3 | 42.6 ± 0.6 | 0.059 |
Hemoglobin (g/dL) | 15.0 ± 0.1 | 14.9 ± 0.1 | 14.8 ± 0.2 | 0.329 |
Hemoglobin (g/dL)a | 15.0 ± 0.1 | 14.8 ± 0.1 | 14.6 ± 0.2 | 0.035 |
Mean corpuscular volume (fl) | 91.4 ± 0.4 | 91.2 ± 0.4 | 92.2 ± 0.9 | 0.681 |
Mean corpuscular volume (fl)a | 90.8 ± 0.4 | 90.9 ± 0.4 | 92.1 ± 0.8 | 0.275 |
Mt5178A | N = 62 | N = 87 | N = 21 |  |
Red blood cell count (104/μL) | 490 ± 5 | 485 ± 4 | 487 ± 9 | 0.615 |
Red blood cell count (104/μL)a | 491 ± 5 | 483 ± 5 | 487 ± 9 | 0.485 |
Hematocrit (%) | 44.2 ± 0.4 | 44.2 ± 0.3 | 44.6 ± 0.6 | 0.668 |
Hematocrit (%)a | 44.4 ± 0.4 | 44.1 ± 0.3 | 44.4 ± 0.6 | 0.889 |
Hemoglobin (g/dL) | 15.1 ± 0.1 | 15.1 ± 0.1 | 15.2 ± 0.2 | 0.758 |
Hemoglobin (g/dL)a | 15.2 ± 0.1 | 15.0 ± 0.1 | 15.1 ± 0.2 | 0.711 |
Mean corpuscular volume (fl) | 90.6 ± 0.6 | 91.5 ± 0.5 | 91.7 ± 1.0 | 0.247 |
Mean corpuscular volume (fl)a | 90.8 ± 0.6 | 91.5 ± 0.5 | 91.4 ± 0.9 | 0.451 |