Table 1.

Sample Characteristics at Study Enrollment by Iron Status in Infancy

	Good Iron Status (N = 33)	Chronic, Severe Iron Deficiency (N = 81)
Age (months) ‡	17.3 ± .4	15.9 ± .6
Birth weight (kg) ■	3.27 ± .04	3.14 ± .06
Sex (% male) ‡	41%	63%
Breastfed (% yes)	96%	88%
Age of weaning from breast (months)	7.0 ± .6	5.5 ± .1
Amount of milk or formula per day (ounces)	27.8 ± 1.2	29.4 ± 1.9
Age of introduction of cow milk (months)	7.7 ± 2.0	9.0 ± 3.0
Number of bottles per day	3.6 ± .2	4.0 ± .2
Mother’s education (years)	9.7 ± .3	8.7 ± .5
Mother’s IQ ●	86.2 ± 1.3	77.3 ± 2.1
Father present (% yes)	78%	67%
Grandparents present (% yes) ■	36%	53%
HOME scores ●	31.3 ± .7	26.9 ± 1.1
Hollingshead scores	29.9 ± 1.2	28.2 ± 1.9
Participant IQ ■	87.4 ± 1.4	82.6 ± 2.3

^●Significant differences are indicated as follows: p < .01

^‡p < .05

^■p ≤ .10