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Table 1 Demographic characteristics

From: Tap water use amongst pregnant women in a multi-ethnic cohort

  

Nested subset

Main cohort

Characteristics

 

n

%

n

%

All

 

39

100.0

4070

100.0

Age

<20

2

5.1

302

7.4

 

20-24

4

10.3

1088

26.7

 

25-29

13

33.3

1317

32.4

 

30-34

15

38.5

839

20.6

 

35-39

4

10.3

450

11.1

 

≥40

1

2.6

73

1.8

 

Missing data

  

1

0.02

Marital Status

Married

31

79.5

2864

70.4

 

Single

8

20.5

1198

29.4

 

Missing data

  

8

0.2

Highest Educational Qualification

None

4

10.3

698

17.1

 

O level/GCSE or A level

13

33.3

1389

34.1

 

Degree

14

35.9

827

20.3

 

Other (e.g. NVQ)

8

20.5

1094

26.9

 

Don't know

  

53

1.3

 

Missing data

  

9

0.2

Employment status

Employed

20

51.3

1624

39.9

 

Unemployed

18

46.2

2258

55.5

 

Maternity/Sick leave

1

2.6

184

4.5

 

Missing data

  

4

0.1

Parity

0

14

35.9

1587

39.0

 

1

15

38.5

1198

29.4

 

2

7

17.9

657

16.1

 

3+

3

7.7

528

13.0

 

Missing data

  

100

2.5

Household Income

<£20,000

15

38.5

1876

46.1

 

£20,000-40,000

14

35.9

953

23.4

 

>£40,000

7

17.9

332

8.2

 

Don't know

3

7.7

846

20.8

 

Not stated/missing

  

63

1.4

Ethnicity

White British

19

48.7

1573

38.6

 

White Other

1

2.6

96

2.4

 

Pakistani

15

38.5

1873

46.0

 

Indian

1

2.6

159

3.9

 

Bangladeshi

0

0.0

94

2.3

 

Any other Asian origin

0

0.0

40

1.0

 

Black or Black British

1

2.6

105

2.6

 

Mixed

0

0.0

67

1.6

 

All Other

2

5.1

59

1.4

 

Not stated/missing

  

4

0.1

Smoking

Current smoker

4

10.3

562

13.8

 

Past smoker

8

20.5

612

15.0

 

Never smoker

27

69.2

2896

71.2