Table 3.

Characteristics of Infants Completing the Study Through 6 Months of Age

CharacteristicHuman MilkLow MineralModerate MineralP
No. of infants313031
M/F10/2113/1716/15   NS*
Age, wk
 1 mo4.7  ± 0.5†4.8  ± 0.54.6  ± 0.5NS
 3 mo13.3  ± 0.813.6  ± 0.613.3  ± 0.7NS
 6 mo26.3  ± 0.626.5  ± 0.826.3  ± 0.6NS
Weight, kg
 1 mo4.51  ± 0.424.33  ± 0.594.39  ± 0.54NS
 3 mo5.94  ± 0.545.96  ± 0.836.19  ± 0.74NS
 6 mo7.46  ± 0.557.54  ± 0.977.82  ± 0.87NS
Length, cm
 1 mo55.2  ± 1.754.0  ± 2.454.7  ± 2.5NS
 3 mo60.2  ± 2.460.1  ± 3.259.6  ± 2.7NS
 6 mo66.3  ± 2.266.6  ± 2.666.5  ± 2.5NS
Bone mineral content, g
 1 mo96.2  ± 10.9‡85.7  ± 14.7‡93.6  ± 16.2.02 
 3 mo120.7  ± 14.1‡115.7  ± 18.7b§132.5  ± 17.6ab‡§<.001
 6 mo155.4  ± 17.9‡154.1  ± 21.5b§175.6  ± 30.9‡§<.001
Energy intake, kcal/d∥
 1 mo457  ± 86454  ± 79NS
 3 mo548  ± 123539  ± 102NS
 6 mo631  ± 116642  ± 112NS
Protein intake, mg/d
 1 mo10.9  ± 2.110.1  ± 1.7.08 
 3 mo13.1  ± 3.011.9  ± 2.4.07 
 6 mo14.3  ± 2.614.0  ± 2.6NS
Calcium intake, mg/d¶
 1 mo306  ± 58a353  ± 60a.003
 3 mo371  ± 82a417  ± 83a.03 
 6 mo429  ± 87a504  ± 111a.006
Phosphorus intake, mg/d#
 1 mo165  ± 32a263  ± 45a<.001
 3 mo203  ± 45a310  ± 62a<.001
 6 mo269  ± 77a403  ± 100a<.001
  • * NS indicates not significant at P > .20.P values less than .20 are provided.

  • Data are expressed as mean ± SD.

  • § Feeding groups with the same symbols are significantly different from each other.

  • Conversion from calories per day to joules per day is 4.183.

  • Conversion from milligrams of calcium per day to millimoles of calcium per day is 0.02495.

  • # Conversion from milligrams of phosphorus per day to millimoles of phosphorus per day is 0.03229.