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Table 6 Univariate analysis of allergy in pregnant women

From: Investigations on incidence and relevant factors of allergies in 5725 urban pregnant women: a cohort study in China

 

Allergic group

Control group

χ2

P value

Number

Ratio (%)

Number

Ratio (%)

Age

  < 35

1026

85.5

3872

85.6

0.004

0.952

  ≥ 35

174

14.5

653

14.4

Ethnic group

  Han

1150

95.8

4273

94.4

3.733

0.053

  Minority

50

4.2

252

5.6

Pre-existing allergies of pregnant women

  Yes

563

46.9

820

18.1

429.241

0.000

  No

637

53.1

3705

81.9

Pre-existing allergies of their fathers

  Yes

141

11.8

229

5.1

70.167

0.000

  No

1059

88.2

4296

94.9

Pre-existing allergies of their mothers

  Yes

138

11.5

252

5.6

52.556

0.000

  No

1062

88.5

4273

94.4

Carpet

  Yes

121

10.1

454

10.0

0.003

0.959

  No

1079

89.9

4071

90.0

Heating facilities

  Heating radiator

176

14.7

630

13.9

2.151

0.341

  Air-conditioner

757

63.1

2799

61.9

  Stove

267

22.2

1096

24.2

Ventilation

  Yes

106

8.8

436

9.6

0.712

0.399

  No

1094

91.2

4089

90.4

Cooking fuel use

  Yes

790

65.8

2874

63.5

2.215

0.137

  No

410

34.2

1651

36.5

Home humidity

  Moist

12

1.0

58

1.3

1.030

0.597

  Moderate

966

80.5

3668

81.1

  Dry

222

18.5

799

17.6

Decorations

  < Half a year

27

2.3

68

1.5

6.042

0.049

  Half a year ~  < Two years

269

22.4

922

20.4

  ≥ Two years

904

75.3

3535

78.1

Pets contacting

  Never

993

82.8

3859

85.3

5.064

0.167

  Occasional contact (1–2 times / month)

120

10.0

401

8.9

  Frequent contact (not close)

63

5.3

192

4.2

  Close contact (daily contact)

24

2.0

73

1.6

Planting

  Yes

712

59.3

2576

56.9

2.244

0.134

  No

488

40.7

1949

43.1

Plush toys

  Yes

262

21.8

842

18.6

6.340

0.012

  No

938

78.2

3683

81.4

Disinfectants

  Yes

167

13.9

434

9.6

18.887

0.000

  No

1033

86.1

4091

90.4

Mosquito repellents

  Yes

70

5.8

260

5.7

0.013

0.908

  No

1130

94.2

4265

94.3

Insecticides

  Yes

15

1.25

30

0.7

4.191

0.041

  No

1185

98.75

4495

99.3

Air fresheners

  Yes

37

3.1

138

3.0

0.004

0.952

  No

1163

96.9

4387

97.0

Smoking

  Yes

993

82.75

3796

83.9

0.901

0.343

  No

207

17.25

729

16.1

Drinking

  Yes

62

5.2

220

4.9

0.187

0.655

  No

1138

94.8

4304

95.1

Antihistamines

  Yes

11

0.9

19

0.4

4.490

0.034

  No

1189

99.1

4506

99.6

Antibiotics

  Yes

33

2.75

86

1.9

3.362

0.067

  No

1167

97.25

4439

98.1

Glucocorticoids

  Yes

18

1.5

22

0.5

14.051

0.000

  No

1182

98.5

4503

99.5

Antipyretic analgesics

  Yes

32

2.7

62

1.4

9.872

0.002

  No

1168

97.3

4463

98.6

Tocolytic agent

  Yes

422

35.2

1414

31.2

6.684

0.010

  No

778

64.8

3111

68.8

Probiotics

  Yes

89

7.4

236

5.2

8.583

0.003

  No

1111

92.6

4289

94.8

Depression grading

  Normal

332

27.7

1438

31.8

11.040

0.026

  Mild

673

56.1

2340

51.7

  Moderate

156

13.0

580

12.8

  Less severe

28

2.3

137

3.0

  Severe

11

0.9

30

0.7

Anxiety grading

  Normal

712

59.3

2932

64.8

12.392

0.006

  Mild

416

34.7

1357

30.0

  Moderate

62

5.2

199

4.4

  Severe

10

0.8

36

0.8

Pre-BMI

  18.5 ~ 23.9(Normal weight)

846

70.5

3100

68.5

1.939

0.379

  < 18.5(Underweight)

181

15.1

747

16.5

  24 ~ 28(Overweight)

127

10.6

520

11.5

  > 28(Obesity)

46

3.8

158

3.5