Hemoglobin, hematocrit, red blood cells, mean corpuscular volume, and white blood cells in children 1 to 14 years of age, by age group and sex: The Third National Health and Nutrition Examination Survey (1988 to 1991)

Characteristic	Male* (n = 5070)				Female* (n = 5175)
Characteristic	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

The 95% confidence interval (+/– 2 SD) defines the normal range, and corresponds to the 2.5^th through 97.5^th percentiles.

SD: standard deviation; 95% CI: 95 percent confidence interval.
* Includes all race/ethnic groups.
¶ Hemoglobin is sometimes reported as grams/liter (g/L), in which case the values are 10 times those reported as g/dL (13.5 g/dL = 135 g/L).

Adapted from: Hollowell JG, van Assendelft OW, Gunter EW, et al. Hematological and iron-related analytes-reference data for persons aged 1 year and over: United States, 1988-94. Vital Health Stat 2005; 11:1.

Graphic 57465 Version 13.0

خرید پکیج

Hemoglobin, hematocrit, red blood cells, mean corpuscular volume, and white blood cells in children 1 to 14 years of age, by age group and sex: The Third National Health and Nutrition Examination Survey (1988 to 1991)