Table 3.

Mean study sample Hgb concentration (gm/dl) in one and four year olds with or without pre-diagnosed nutritional anaemia and abnormal laboratory test values

	Blood Hgb conc (g/dL)
	Range	Mean	95% confidence interval of the mean	SD	SE	N	(3rd-97th centile)
One year old
Pre-diagnosed nutritional anaemia/abnormal lab values
Included	(18-5.6)	11.8	(11.8-11.8)	1.1	0.006	26653	(9.7-13.6)
Excluded	(18-5.6)	11.8	(11.8-11.8)	1	0.006	25552	(9.9-13.7)
4 years old
Pre-diagnosed nutritional anaemia/abnormal lab values
Included	(16.1-5.7)	12.1	(12.1-12.1)	0.9	0.008	12754	(10.5-13.8)
Excluded	(16.1-5.7)	12.2	(12.1-12.2)	0.8	0.008	12251	(10.7-13.8)