Table 1.

Attributes at Study Entry of Infants Randomized to the Experimental and Control Groups

Attributes Experimental Control P Value
Gestational age at birth (wk)36.7 (2.25)*36.4 (2.69).71
Chronological age at entry (d) 302.6 (52.6)312.1 (66.1) .66
BSID-II motor score37.3 (1.05) 37.8 (1.01) .23
Number of siblings .5 (.64) 1.5 (1.55) .04
Mother's education level (y) 15.8 (1.70) 15.0 (1.46) .18
Father's education level (y) 15.8 (2.21) 15.5 (1.85).72
Family income (thousands) 63.3 (24.4) 56.0 (20.6).38
Crown-heel length (cm) 69.2 (2.62) 69.6 (2.74).66
Weight (kg) 8.2 (.90) 8.1 (.92) .67
Thigh length (cm) 12.3 (.66) 12.2 (.67) .54
Calf length (cm) 12.6 (.73) 12.2 (.81) .13
Foot width (cm)4.4 (.20) 4.4 (.23) .34
Foot length (cm)9.8 (.40) 9.8 (.72) .87
Mid-thigh circumference (cm)24.9 (2.12) 24.4 (2.30) .55
Mid-calf circumference (cm) 17.3 (1.16) 16.8 (1.38) .33
Umbilicus skinfold (mm) 7.5 (2.30) 6.4 (2.07) .17
Mid-thigh skinfold (mm) 12.9 (2.87) 11.9 (2.04) .25
Mid-calf skinfold (mm) 14.5 (2.15) 14.3 (2.25) .77
  • *  Mean (standard deviation).

  •  Raw score.