Table 1 Baseline demographic characteristics

Age at trial entry, years^a

29.1 (5.7)

29.8 (5.1)

Gestational age at trial entry, weeks^a

15.2 (2.6)

14.9 (2.4)

Primiparous^b

13 (44.8)

13 (43.3)

Completed secondary education^b

20 (69.0)

22 (73.3)

Completed further education^b

22 (75.9)

24 (80.0)

Smoke at trial entry or leading up to pregnancy^b

7 (24.1)

5 (16.7)

Miscarriage in previous pregnancy^b

8 (27.6)

12 (40.0)

Previous or current depression^b

4 (13.8)

7 (23.3)

BMI at trial entry^a

25.3 (5.9)

23.6 (3.9)

Pre-pregnancy BMI^a

23.6 (5.5)

22.2 (4.3)

Infant sex: male^b

20 (71.4)

9 (31.0)