Table 2

Demographics and pre-randomisation measures, at 9 months of age, for children assessed at 18 months

Cows’ milkUnfortified formulaIron fortified formula
Birth weight (g)3600 (470)3500 (450)3500 (510)
Gestation (weeks)  39.9 (1.4)  39.9 (1.3)  39.8 (1.4)
Age in weeks at randomisation   41.0 (1.4)  40.9 (1.4)  40.9 (1.4)
Boys (n (%))  91 (57)  68 (50)  67 (50)
Previously breast fed (n (%)) 100 (63)  81 (60)  83 (62)
Median duration of breast feeding (weeks) (75th centile)   4 (24)   4 (16)   4 (24)
First child (n (%)) 145 (91) 128 (96) 122 (92)
Mother had higher education (n (%))  44 (28)  29 (22)  35 (26)
Non-manual social class (n (%))  71 (44)  64 (47)  58 (44)
Weight (g)9400 (1100)9100 (1000)9200 (1200)
Length (cm)  72.1 (2.5)  71.6 (2.6)  71.9 (3.0)
Head circumference (cm)  46.0 (1.4)  45.8 (1.4)  45.9 (1.4)
Mid-upper arm circumference (cm)  15.8 (1.4)  15.4 (1.3)  15.7 (1.4)
Triceps skinfold thickness (mm)  12.3 (2.8)  11.8 (2.9)  11.9 (2.6)
Subscapular skinfold thickness (mm)   7.7 (2.1)   7.6 (2.2)   7.7 (2.0)
Developmental score2-150   99.2 (6.0)  99.4 (7.5)  99.6 (6.7)
  • Values are mean (SD) unless otherwise stated.

  • 2-150 From Knobloch, Pasamanick, and Sherard’s developmental screening inventory.