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Table 1 Participant characteristics at baseline

From: Measuring physical and mental health during pregnancy and postpartum in an Australian childbearing population - validation of the PROMIS Global Short Form

Characteristic

Total samplef

n = 309

State maternity population

2016

n = 61,858a

National maternity population

2016

n = 310,247a

n

%

n

%

n

%

Gestation (M, SD, Range)

19.7 (3.7)

(10–27)

–

–

–

–

 Age (M, SD, Range)

29.8 (5.0)

(19–43)

–

–

30.5

–

  Less than 20

3

1.0

2110

3.4a

7395

2.4 a

  20–34

250

80.9

47,559

76.8a

232,034

74. a

  35 or more

56

18.1

12,189

19.7a

70,776

22.8 a

 Parity

  Primiparous

125

40.5

25,336

41.0a

132,842

42.8 a

  Multiparous

184

59.5

36,522

59.0a

176,671

56.9 a

 Marital status

  Married/defacto

290

93.9

49,686

80.3b

–

–

  Single

17

5.5

11,110

18.0 b

–

–

  Separated, divorced, widowed

2

0.6

989

1.7 b

–

–

E ducation

  Secondary < year 12

34

11.0

–

–

–

–

  Secondary to year 12

64

20.7

–

–

–

–

  Apprentice / Diploma

100

32.4

–

–

–

–

  Tertiary study

111

35.9

–

–

–

–

 Employment/study

  No paid work or study

72

23.3

–

–

–

–

  Paid work

207

67.0

–

–

–

–

  Study

10

3.2

–

–

–

–

  Both paid work & study

20

6.5

–

–

–

–

 Income $ (Weekly combined)

  Lowest income (Neg – 999)

45

16.1

544,127

32.0 c

2,661,359

31.5 c

  Medium lowest (1000–1499)

74

26.5

271,663

16.0 c

1,278,704

15.2 c

  Medium highest (1500–2499)

113

40.5

378,689

22.2 c

1,840,443

21.8 c

  Highest income (2500- ≥ 5000)

47

16.8

326,440

19.2 c

1,772,945

21.0 c

 Birth country

  Australia

224

72.5

45,059

72.8a

201,984

65.1a

  Elsewhere

85

27.5

16,737

27.1 a

106,572

34.4 a

 Body mass index (M, SD, Range)

24.2 (6.8)

17.2–47.0

    

  Underweight < 18.5

5

1.6

3431

5.5a

12,212

3.9 a

  Normal weight 18.5–24.9

141

45.6

31,131

50.3a

152,022

49.0 a

  Overweight 25.0–29.9

76

24.6

14,228

23.0a

76,019

24.5 a

  Obese class 1/2 30.0–39.9

55

17.8

10,166

16.4a

49,593

16.0 a

  Obese class 3 ≥ 40.0

7

2.3

1889

3.0a

8762

2.9 a

 Unplanned pregnancy

88

29.1

–

–

–

–

 Stress in the last 12 months

82

26.5

–

–

–

–

 Smoking

  Smoked during pregnancy

34

11.0

–

–

–

9.9 a

  Previous smoker, < 12 mth ago

19

6.1

–

–

–

–

  Previous smoker, > 12 mth ago

64

20.7

–

–

–

–

 Pre-pregnancy drug use

33

10.7

–

–

–

–

 Past history of:

  Diabetes

2

0.6

–

–

–

0.7 d

  Hypertension

4

1.3

–

–

–

0.8 a

  Mental health disorder

44

14.2

–

–

–

–

  Caesarean birth

39

12.6

–

–

–

41.5 a

 Current twin pregnancy

6

1.9

–

–

–

1.4e

  1. Note national and state percentages may not compute to 100% due to missing values
  2. aAIHW (2018) [32]
  3. bQueensland Health (2016) [34]
  4. cProfile Id (2016) [31]
  5. dAIHW (2019) [30]
  6. eAIHW (2018) [33]
  7. fn and % values for women who responded