Table 4.

Mean Hgb concentration (gm/dl) in healthy one and four years old age groups by nationality and gender

Excluding Pre-diagnosed nutritional anaemia/Abnormal lab values	Range	Mean	95% confidence interval of the mean	SD	SE	N	(3rd-97th centile)
One year old
Northern Africa	(16.4-6.6)	11.6	(11.6-11.7)	1.1	0.014	6004	(9.5-13.6)
Sub-Saharan Africa	(14.9-8.5)	11.8	(11.7-11.9)	1	0.042	579	(9.9-13.8)
Northern America	(15.1-9.6)	12	(12-12.1)	0.9	0.038	524	(10.4-13.7)
South-Eastern Asia	(16.1-5.6)	12.3	(12.2-12.3)	1	0.026	1389	(10.6-14.1)
Southern Asia	(18-6)	11.7	(11.7-11.8)	1	0.012	6914	(9.7-13.5)
Western Asia	(17.4-6.8)	11.9	(11.9-12)	0.9	0.01	9722	(10.1-13.7)
Europe	(15.3-9.3)	12	(11.9-12.1)	0.9	0.051	293	(10.5-13.7)
Other nationalities	(14.8-8.6)	12	(11.8-12.3)	1.1	0.112	99	(9.6-14.2)
Female	(17.4-6.1)	11.9	(11.8-11.9)	1	0.009	12731	(10-13.7)
Male	(18-5.6)	11.8	(11.8-11.8)	1	0.009	12821	(9.7-13.7)
Total	(18-5.6)	11.8	(11.8-11.8)	1	0.006	25552	(9.9-13.7)
95% confidence interval of Hgb values = (9.8-13.8)
4 years old
Northern Africa	(15.4-9)	12.2	(12.1-12.2)	0.8	0.015	2777	(10.7-13.8)
Sub-Saharan Africa	(14.5-9.1)	12.2	(12-12.3)	0.9	0.088	103	(10.4-13.4)
Northern America	(14.2-10.4)	12.4	(12.2-12.5)	0.8	0.069	123	(10.8-13.8)
South-eastern Asia	(15.3-10.4)	12.7	(12.6-12.8)	0.8	0.053	244	(11.2-14.3)
Southern Asia	(14.9-5.7)	12.1	(12.1-12.2)	0.9	0.026	1231	(10.6-13.8)
Western Asia	(16.1-7.4)	12.1	(12.1-12.2)	0.8	0.01	7671	(10.6-13.7)
Europe	(13.7-9.7)	12	(11.8-12.2)	0.8	0.106	64	(9.9-13.6)
Other nationalities	(14-10.1)	12.3	(12-12.7)	0.9	0.179	27	(10.1-14)
Female	(16.1-5.7)	12.2	(12.2-12.2)	0.8	0.011	6020	(10.7-13.8)
Male	(15.4-6.4)	12.1	(12.1-12.2)	0.8	0.011	6231	(10.6-13.8)
Total	(16.1-5.7)	12.2	(12.1-12.2)	0.8	0.008	12251	(10.7-13.8)
95% confidence interval of Hgb values = (10.6-13.8)