Factor

Intervention [n = 162]

Controls [n = 58]

Probability

Age

Mean = 25.85 SD = 4.84

Mean = 24.76 SD = 3.90

0.123

Weight [kg]

Mean = 62.04 SD = 9.38

Mean = 66.44 SD = 10.48

0.003

Week of Pregnancy

Mean = 24.28 SD = 5.13

Mean = 22.41 SD = 3.84

0.012