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Table 1 Characteristics of the study population.

From: Risk of infection and adverse outcomes among pregnant working women in selected occupational groups: A study in the Danish National Birth Cohort

 

Work with patients1

(N = 8699)

Work with children2

(N = 9151)

Work with food3

(N = 932)

Work with

animals4

(N = 287)

Total exposed workers

(N = 19069)

Other workers

(N = 46308)

 

N

%

N

%

N

%

N

%

N

%

N

%

Maternal age, years

            

   < 30

4166

48.7

4313

48.0

569

62.3

168

59.2

9216

49.2

19724

43.3

   30-34

3089

36.1

3340

37.2

246

26.9

84

29.6

6759

36.1

18425

40.5

   35+

1294

15.1

1335

14.9

99

10.8

32

11.3

2760

14.7

7358

16.2

   Total

8549

100.0

8988

100.0

914

100.0

284

100.0

18735

100.0

45507

100.0

Parity

            

   0

3354

38.6

3465

37.9

332

35.7

98

34.1

7249

38.0

17701

38.2

   1+

5342

61.4

5684

62.1

599

64.3

189

65.9

11814

62.0

28584

61.8

   Total

8696

100.0

9149

100.0

931

100.0

287

100.0

19063

100.0

46285

100.0

Pre-pregnancy body mass index, kg/m2

            

   Underweight (< 18.5)

75

0.9

61

0.7

9

1.1

9

0.1

145

0.8

530

1.3

   Normal weight (18.5-24.9)

5183

64.7

4802

58.6

376

44.8

125

48.8

10486

60.6

26081

62.1

   Overweight (25.0-29.9)

1949

24.3

2272

27.7

279

33.2

78

30.5

4578

26.5

10997

26.2

   Obese/very obese (30.0+)

800

10.0

1064

13.0

176

21.0

53

20.7

2093

12.1

4381

10.4

   Total

8007

100.0

8199

100.0

840

100.0

256

100.0

17302

100.0

41989

100.0

Smoking habit

            

   No

6608

76.0

6779

76.0

619

66.5

182

63.4

14188

74.4

34709

75.0

   Yes

2086

24.0

2086

24.0

312

33.5

105

36.6

4872

25.6

11586

25.0

   Total

8694

100.0

8694

100.0

931

100.0

287

100.0

19060

100.0

46295

100.0

Smoking habit, cig./day¥

            

   0

6627

76.2

6807

74.4

623

66.9

183

63.8

14240

74.7

34806

75.2

   1-9

1193

13.7

1364

14.9

162

17.4

40

13.9

2759

14.5

6483

14.0

   10-19

758

8.7

850

9.3

123

13.2

55

19.2

1786

9.4

4241

9.2

   20+

116

1.3

127

1.4

23

2.5

9

3.1

275

1.4

766

1.7

   Total

8694

100.0

9148

100.0

931

100.0

287

100.0

19060

100.0

46296

100.0

Alcohol consumption, gr./week

            

   0

6278

72.2

6788

74.2

748

80.3

232

80.8

14046

73.7

32222

69.6

   0.1-19.9

149

1.7

157

1.7

5

0.5

3

1.0

314

1.6

744

1.6

   20-39.9

1470

16.9

1412

15.4

124

13.3

32

11.1

3038

15.9

8473

18.3

   40+

802

9.2

794

8.7

55

5.9

20

7.0

1671

8.8

4869

10.5

   Total

8699

100.0

9151

100.0

932

100.0

287

100.0

19069

100.0

46308

100.0

History of miscarriage

            

   No

7142

82.2

7592

83.0

775

83.2

246

85.7

15755

82.7

38282

82.7

   Yes

1550

17.8

1555

17.0

156

16.8

41

14.3

3302

17.3

7984

17.3

   Total

8692

100.0

9147

100.0

931

100.0

287

100.0

19057

100.0

46266

100.0

Infertility treatment

            

   No

8045

92.5

8565

93.6

876

94.0

277

96.5

17763

93.2

42780

92.4

   Yes

649

7.5

586

6.4

56

6.0

10

3.5

1301

6.8

3505

7.6

   Total

8694

100.0

9151

100.0

932

100.0

287

100.0

19064

100.0

46285

100.0

Work at the time of the 1st interview*

            

   No

298

3.4

428

4.7

82

8.8

32

11.1

840

4.4

171

0.4

   Yes

8400

96.6

8722

95.3

849

91.2

255

88.9

18226

95.6

41039

99.6

   Total

8698

100.0

9150

100.0

931

100.0

287

100.0

19066

100.0

41210

100.0

Socio-occupational status

            

   High

6484

74.5

7386

80.7

213

22.9

49

17.1

14132

74.1

30294

65.5

   Medium

2210

25.4

1762

19.3

719

77.1

168

58.5

4859

25.5

14564

31.5

   Low

4

0.1

2

0.1

0

0

70

24.4

76

0.4

1421

3.1

   Total

8698

100.0

9150

100.0

932

100.0

287

100.0

19067

100.0

46279

100.0

  1. 1Health care and laboratory workers in hospitals
  2. 2Day care centres workers and school teacher
  3. 3Kitchen assistant, waitress and butcher
  4. 4Skiled farm worker, slaughter house worker
  5. ¥1 cigarette = 1 cigarette equivalent, 1 cherrot = 2 cigarette equivalent, 1 cigar = 2 cigarette equivalent, 1 pipe = 1.5 cigarette equivalent.
  6. Among singletons
  7. *First tree month of the pregnant