Characteristics of hemoglobin distributions in preschool children and non-pregnant women of reproductive age and their implications for establishing quality control criteria for hemoglobin data in field surveys: evidence from 483 surveys conducted in refugee settings worldwide

Table 3 Survey-level hemoglobin distribution parameters and prevalence of total anemia in children and women

	Mean Hb^a	Median Hb^a	% Total Anemia	SD^a	SD excluding Uganda^b	Skewness	Skewness excluding Uganda^b	Kurtosis	Kurtosis excluding Uganda^b
Child surveys (n = 461)
Mean	11.1	11.2	43.5	1.39	1.34	− 0.37	− 0.38	0.54	0.55
SD	0.50	0.49	13.6	0.21	0.15	0.26	0.23	0.67	0.66
Maximum	12.5	12.5	81.7	2.37	1.84	1.25	0.78	5.03	5.03
P97.5	12.1	12.1	72.1	1.93	1.67	0.10	0.05	2.18	2.17
P90	11.7	11.8	61.3	1.67	1.53	− 0.09	− 0.09	1.37	1.37
P75	11.4	11.5	52.4	1.48	1.44	− 0.24	− 0.24	0.84	0.82
P50	11.1	11.2	42.9	1.34	1.32	− 0.38	− 0.38	0.42	0.44
P25	10.8	10.9	33.3	1.25	1.23	− 0.51	− 0.51	0.10	0.10
P10	10.4	10.5	26.6	1.18	1.17	− 0.67	− 0.67	− 0.14	− 0.10
P2.5	10.1	10.1	18.6	1.09	1.09	− 0.81	− 0.83	− 0.34	− 0.27
Minimum	9.6	9.7	12.2	1.01	1.01	− 1.32	− 1.32	− 1.05	− 0.51
WRA Surveys (n = 401)
Mean	12.6	12.7	30.2	1.47	1.43	− 0.53	− 0.55	1.15	1.22
SD	0.57	0.56	13.2	0.23	0.18	0.36	0.36	1.17	1.18
Maximum	13.9	13.9	74.5	2.56	2.01	0.77	0.77	8.40	8.40
P97.5	13.7	13.8	58.0	2.11	1.79	0.18	0.17	3.87	4.05
P90	13.4	13.5	47.6	1.74	1.66	− 0.08	− 0.09	2.83	2.87
P75	13.0	13.0	38.4	1.57	1.54	− 0.28	− 0.32	1.62	1.68
P50	12.6	12.7	29.2	1.44	1.42	− 0.53	− 0.55	0.89	0.93
P25	12.2	12.3	20.9	1.31	1.29	− 0.76	− 0.78	0.38	0.43
P10	11.9	12.0	13.2	1.20	1.20	− 0.98	− 0.99	− 0.04	0.06
P2.5	11.6	11.6	7.5	1.13	1.12	− 1.32	− 1.37	− 0.38	− 0.24
Minimum	10.6	10.45	2.8	1.00	1.00	− 1.87	− 1.87	− 0.81	− 0.81

Data exclude Hb values < 4.0 g/dL and > 18.0 g/dL. Hb Hemoglobin; P Percentile; SD Standard deviation; WRA Women of reproductive age
^aValues are in g/dL
^bData exclude surveys conducted in Uganda (n = 56 child surveys and n = 39 WRA surveys)

ISSN: 1478-7954