Table 1 Characteristics of pregnant women in control and intervention groups

Age (years)

24.28 ± 4.15

24.31 ± 4.22

0.989

Education mean (years)

6.6 ± 2.8

7.6 ± 3.2

0.213

Prepregnancy BMI (kg/m²)

22.82 ± 3.93

23.86 ± 4.10

0.285

Gestational age at recruitment (weeks)

6.64 ± 2.66

7.95 ± 2.85

0.160

Working status [n (%)]

2 (4.4)

7 (15.6)

0.079

Income [n (%)]

ᅟLow

11 (24.4)

15 (33.3)

0.220

ᅟMiddle

34 (75.6)

30 (66.7)

ᅟHigh

–

–

Intended pregnancy [n (%)]

40 (89.9)

38 (84.4)

0.589

Gravidity [n (%)]

ᅟ1

25 (55.6)

29 (64.4)

0.486

ᅟ2

20 (44.4)

16 (35.6)