Characteristic | Male* (n = 5070) | Female* (n = 5175) | ||||||
Mean | SD | 95% CI | Mean | SD | 95% CI | |||
Hemoglobin, g/dL¶ | ||||||||
1 to 2 years | 12.01 | 0.82 | 10.37 | 13.65 | 12.02 | 0.8 | 10.42 | 13.62 |
3 to 5 years | 12.35 | 0.77 | 10.81 | 13.89 | 12.39 | 0.77 | 10.85 | 13.93 |
6 to 8 years | 12.88 | 0.8 | 11.28 | 14.48 | 12.82 | 0.77 | 11.28 | 14.36 |
9 to 11 years | 13.28 | 0.84 | 11.6 | 14.96 | 13.1 | 0.78 | 11.54 | 14.66 |
12 to 14 years | 14.14 | 1.08 | 11.98 | 16.3 | 13.29 | 1 | 11.29 | 15.29 |
15 to 19 years | 15.07 | 1.03 | 13.01 | 17.13 | 13.15 | 1 | 11.15 | 15.15 |
Hematocrit, percent | ||||||||
1 to 2 years | 36 | 2 | 32 | 40 | 36 | 2 | 32 | 40 |
3 to 5 years | 37 | 2 | 33 | 41 | 37 | 2 | 33 | 41 |
6 to 8 years | 38 | 2 | 34 | 42 | 38 | 2 | 34 | 42 |
9 to 11 years | 39 | 2 | 35 | 43 | 39 | 2 | 35 | 43 |
12 to 14 years | 42 | 3 | 36 | 48 | 40 | 3 | 34 | 46 |
15 to 19 years | 45 | 3 | 39 | 51 | 39 | 3 | 33 | 45 |
Red blood cells, 1012 cells per liter | ||||||||
1 to 2 years | 4.55 | 0.34 | 3.87 | 5.23 | 4.5 | 0.34 | 3.82 | 5.18 |
3 to 5 years | 4.51 | 0.34 | 3.83 | 5.19 | 4.49 | 0.32 | 3.85 | 5.13 |
6 to 8 years | 4.6 | 0.29 | 4.02 | 5.18 | 4.56 | 0.31 | 3.94 | 5.18 |
9 to 11 years | 4.71 | 0.32 | 4.07 | 5.35 | 4.62 | 0.3 | 4.02 | 5.22 |
12 to 14 years | 4.93 | 0.39 | 4.15 | 5.71 | 4.59 | 0.32 | 3.95 | 5.23 |
15 to 19 years | 5.06 | 0.37 | 4.32 | 5.8 | 4.47 | 0.35 | 3.77 | 5.17 |
Mean corpuscular volume (femtoliters) | ||||||||
1 to 2 years | 79.2 | 4.5 | 70.2 | 88.2 | 79.8 | 4.5 | 70.8 | 88.8 |
3 to 5 years | 81.8 | 4.3 | 73.2 | 90.4 | 82.3 | 4 | 74.3 | 90.3 |
6 to 8 years | 83.2 | 4 | 75.2 | 91.2 | 83.6 | 3.6 | 76.4 | 90.8 |
9 to 11 years | 83.9 | 3.7 | 76.5 | 91.3 | 84.2 | 3.9 | 76.4 | 92 |
12 to 14 years | 85.3 | 4 | 77.3 | 93.3 | 86.2 | 4.2 | 77.8 | 94.6 |
15 to 19 years | 88.3 | 3.9 | 80.5 | 96.1 | 87.8 | 4.7 | 78.4 | 97.2 |
White blood cells, 109 cells per liter | ||||||||
1 to 2 years | 8.74 | 2.53 | 3.68 | 13.8 | 8.66 | 2.41 | 3.84 | 13.48 |
3 to 5 years | 7.68 | 2.26 | 3.16 | 12.2 | 7.9 | 2.12 | 3.66 | 12.14 |
6 to 8 years | 7.45 | 2.02 | 3.41 | 11.49 | 7.63 | 2.1 | 3.43 | 11.83 |
9 to 11 years | 7.01 | 2.07 | 2.87 | 11.15 | 7.2 | 1.98 | 3.24 | 11.16 |
12 to 14 years | 7.02 | 2.07 | 2.88 | 11.16 | 7.3 | 2.06 | 3.18 | 11.42 |
15 to 19 years | 7.15 | 2.11 | 2.93 | 11.37 | 7.58 | 2.18 | 3.22 | 11.94 |
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