TABLE 2

Subject Characteristics

VariableRandomized Formula-Fed GroupsBreastfed Reference Group (N = 101)Comparison of 3 Dietary Groups, Pa
Control (N = 100)Nucleotide Supplemented (N = 100)
At birth
Male gender, % (n)56 (56)61 (61)51 (51).4
Weight, g3458 ± 5273459 ± 5903466 ± 497.9
Weight, z score0.3 ± 1.00.1 ± 1.20.1 ± 1.0.6
Gestation, wk39.2 ± 1.339.5 ± 1.439.6 ± 1.1.1
SGA, % (n)b5 (5)15 (15)10 (10).06
Social class, nonmanual labor, % (n)39 (39)41 (41)81 (81)<.001
Mother with academic degree, % (n)8 (8)8 (8)52 (52)<.001
Cesarean birth, % (n)40 (40)32 (32)31 (31).4
At randomization
    Age, d7.5 ± 2.87.1 ± 2.6
    Weight, g3437 ± 5103457 ± 595
    Weight, z score−0.6 ± 1.0−0.5 ± 1.2
    Length, cm50.3 ± 2.250.5 ± 2.8
    Length, z score−0.7 ± 1.1−0.5 ± 1.4
    OFC, cm35.2 ± 1.335.3 ± 1.5
    OFC, z score−0.3 ± 1.0−0.1 ± 1.1
  • Values are mean ± SD analyzed by using the Student's t test or percent (n) analyzed by using the χ2 test. There was a slight loss of n for some variables (<2%). — indicates data not applicable.

  • a The 3 dietary groups were compared by using analysis of variance for continuous data and χ2 for categorical data.

  • b There were no significant differences between infants in the randomized formula-fed groups except for the number of infants born SGA (defined as birth weight <10th centile for gestation and gender) (P = .02).