Table 1 Baseline characteristics of participants with valid accelerometry data at T0, T1 and T2

≥3 days valid data (% consented)

140

(76.5)

76

(41.5)

54

(29.5)

BMI at T0 (Kg/m²)¹

33.8

(31.9, 37.6)

34.1

(32.4, 37.1)

35.6

(33.4, 38.4)**

Age (years) ¹

32

(26, 35)

32

(28, 35)

33

(28, 36)**

Parity

Nulliparous

62

(45.9)

26

(34.7)*

17

(31.5)**

Parous

73

(54.1)

49

(65.3)

37

(68.5)

Smoking status

Current or ex-smoker

46

(34.1)

30

(40.0)

20

(37.0)

Never smoked

89

(65.9)

45

(60.0)

34

(63.0)

Ethnicity

White

84

(62.2)

48

(64.0)

34

(63.0)

Black, Asian or other

51

(37.8)

27

(36.0)

20

(37.0)

Marital status

Married/cohabiting

69

(51.1)

38

(50.7)

28

(51.9)

Single/divorced/separate

66

(48.9)

37

(49.3)

26

(48.1)

Educational achievement

Degree or higher

62

(45.9)

35

(46.7)

26

(48.1)

No degree

73

(54.1)

40

(53.3)

28

(51.9)

Employment status

Paid or self employment

92

(68.7)

50

(66.7)

40

(74.1)

Not in paid employment

42

(31.3)

25

(33.3)

14

(25.9)

Living accommodation

Owned or private rented

76

(54.3)

48

(63.2)*

36

(66.7)**

Rented (council)

64

(45.7)

28

(36.8)

18

(33.3)

IMD quintile

1 (least deprived)

4

(3.4)

4

(6.2)

3

(6.5)

2

4

(3.4)

2

(3.1)

1

(2.2)

3

14

(12.1)

7

(10.8)

4

(8.7)

4

44

(37.9)

26

(40.0)

21

(45.7)

5 (most deprived)

50

(43.1)

26

(40.0)

17

(37.0)

Weight gain²

Above IOM guideline

23

(45.1)

Within or below IOM guideline

28

(54.9)