Table 1.

Characteristics of study population according to supplementation group

Characteristics/Supplement compound	All N =200		Bis-glycinate chelate iron n  = 101		Ferrous sulfate n  = 99		P value a
	n	%	n	%	n	%
Sex
Male	91	45.5	42	41.6	49	49.5
Female	109	54.5	59	58.4	50	50.5	0.261
Age (years)b	9.3	1.9	9.3	2.1	9.4	1.7	0.728
Height for agec
Normal	136	69.1	72	72.7	64	66.0
Low or moderate malnutrition	60	30.6	27	27.3	33	34.0	0.305
Body mass indexd
Normal	147	73.0	70	70.7	73	75.3
Overweight or obese	53	27.0	29	29.3	24	24.7	0.473
Mother’s schooling
High school or more	60	32.3	30	31.9	30	32.6
Middle school or less	126	67.7	64	68.1	62	67.4	0.919
Hemoglobin concentration (g/l)b	140.9	9.1	141.6	10.3	140.2	7.6	0.273
Ferritin concentration (μg/l)b	8.7	2.1	8.7	2.1	8.9	2.1	0.548

^aPearson’s X² test.

^bMean and standard deviation. Student’s t test.

^cWHO’s reference population, 2007 [28].

^dCole et al. Cut-off point by age and sex [27].