Study group

Mean ± SD

Placebo group

Mean ± SD

Mean difference

T value

P value

95% C. I

Lower

Upper

Age

29.4 ± 7.2

32.9 ± 6.1

−3.53

−2.89

0.115

−5.95

−1.11

Parity

4.8 ± 3.5

4.5 ± 2.9

0.31

0.53

0.594

−0.85

1.48

EGA

7.1 ± 1.9

6.6 ± 1.9

0.48

1.41

0.163

−0.98

1.16

Social class

3.8 ± 0.7

3.8 ± 0.6

0.01

0.13

0.898

−0.24

0.27