Table 2 Association between women’s sociodemographic characteristics and being asked about mental health during the antenatal booking appointment across surveys

Total n % (95%CI)

3562

80.3

(79.0, 81.5)

3600

77.5

(76.0, 79.0)

3891

83.4

(82.1, 84.7)

Age of Mother

 16–19

78

79.1

0.90

0.52, 1.56

0.87

0.47, 1.59

46

76.1

0.86

0.43, 1.74

1.26

0.54, 2.96

39

89.5

1.80

0.67, 4.80

1.64

0.60, 4.49

 20–24

403

79.4

0.92

0.70, 1.19

0.91

0.68, 1.21

281

75.8

0.85

0.62, 1.17

1.01

0.70, 1.44

307

85.5

1.24

0.84, 1.82

1.23

0.81, 1.86

 25–29

982

81.9

1.08

0.88, 1.33

1.09

0.87, 1.35

854

77.0

0.91

0.72, 1.14

0.93

0.73, 1.19

972

85.9

1.28

1.00, 1.65

1.37

1.06, 1.78

 30–34

1248

80.8

1

1380

78.7

1

1

1498

82.6

1

1

 35–39

679

79.3

0.91

0.73, 1.13

0.88

0.70, 1.10

830

77.3

0.92

0.74, 1.15

0.95

0.75, 1.19

902

80.9

0.89

0.71, 1.13

0.89

0.70, 1.14

 40 + 

173

74.8

0.70

0.50, 0.99

0.76

0.53, 1.08

209

78.6

1.00

0.70, 1.42

0.97

0.67, 1.39

173

76.3

0.68

0.45, 1.01

0.75

0.49, 1.15

Ethnicity

 White

2951

81.7

1

1

3106

81.1

1

1

3373

86.3

1

1

 Mixed

67

79.8

0.89

0.48, 1.65

0.89

0.47, 1.65

82

77.4

0.80

0.44, 1.45

0.87

0.48, 1.57

85

82.2

0.73

0.41, 1.32

0.85

0.45, 1.61

 Asian

311

73.2

0.61

0.48, 0.79

0.65

0.50, 0.85

204

62.3

0.39

0.29, 0.52

0.39

0.29, 0.53

276

68.7

0.35

0.27, 0.46

0.42

0.32, 0.56

 Black

121

79.6

0.87

0.56, 1.36

0.99

0.60, 1.60

70

65.8

0.45

0.27, 0.74

0.60

0.35, 1.04

92

75.4

0.49

0.30, 0.78

0.64

0.38, 1.07

 Other

17

78.0

0.80

0.29, 2.21

0.82

0.29, 2.32

48

72.5

0.61

0.33, 1.16

0.63

0.32, 1.20

17

63.3

0.27

0.12, 0.64

0.33

0.13, 0.86

IMD

 1 (least advantaged)

664

78.2

0.93

0.73, 1.18

1.05

0.81, 1.37

528

71.6

0.59

0.46, 0.76

0.75

0.57, 0.98

575

81.9

0.76

0.57, 1.02

0.82

0.60, 1.12

 2

772

81.2

1.12

0.88, 1.42

1.22

0.95. 1.57

694

77.1

0.78

0.61, 1.01

0.99

0.76, 1.30

726

80.7

0.70

0.53, 0.93

0.78

0.58, 1.05

 3

742

81.6

1.15

0.90, 1.46

1.19

0.93, 1.52

764

80.1

0.94

0.73, 1.20

1.03

0.79, 1.33

812

84.3

0.91

0.69, 1.19

0.92

0.69, 1.22

 4

693

82.0

1.18

0.92, 1.50

1.24

0.96, 1.60

824

81.5

1.03

0.81, 1.31

1.12

0.86, 1.44

915

86.1

1.04

0.80, 1.35

1.00

0.76, 1.32

 5 (most advantaged)

691

79.4

1

1

790

81.1

1

1

863

85.6

1

1

Education

  < 17

569

79.2

0.88

0.71, 1.10

0.91

0.71, 1.17

377

73.6

0.77

0.59, 1.01

0.81

0.60, 1.09

435

85.2

1.32

0.97, 1.79

1.29

0.92, 1.83

 17–18

948

80.1

0.93

0.77, 1.13

0.91

0.74, 1.13

857

79.3

1.06

0.85, 1.32

1.02

0.80, 1.29

1066

87.1

1.54

1.23, 1.93

1.37

1.06, 1.76

 19 + 

1989

81.2

1

1

2342

78.4

1

1

2356

81.4

1

1

Lives with partner

 No

432

78.3

0.86

0.68, 1.09

0.90

0.69, 1.18

330

68.6

0.56

0.44, 0.72

0.67

0.50, 0.89

377

79.9

0.75

0.56, 1.00

0.70

0.50, 0.97

 Yes

3133

80.7

1

1

3270

79.5

1

1

3514

84.2

1

1

Parity

 Primiparous

1754

81.6

1.19

1.01, 1.41

1.12

0.94, 1.34

1910

80.1

1.31

1.10, 1.56

1.21

1.00, 1.46

1989

83.0

1.11

0.92, 1.35

0.97

0.80, 1.19

 Multiparous

1707

78.8

1

1

1625

75.5

1

1

1820

85.5

1

1