Table 1

Characteristics of the two study populations with exposure reported at 6 weeks and 1 year.

Exposure reported at 6 weeks, N = 2657

Exposure reported at 1 year, N = 3087


Reported exposure a

    n

    %

    (95% CI)

    n

    %

    95% CI


Gender

Male

1333

50.2

(48.3-52.1)

1529

49.5

(47.8-51.3)

Homeowner

Yes

2242

84.4

(82.9-85.7)

2680

86.8

(85.6-88.0)

Cat

Yes

239

9.0

(7.9-10.1)

266

8.6

(7.7-9.7)

Dog

Yes

247

9.3

(8.2-10.5)

249

8.1

(7.1-9.1)

Bird

Yes

63

2.4

(1.8-3.0)

70

2.3

(1.8-2.9)

Dampness

Yes

105

4.0

(3.2-4.8)

117

3.8

(3.1-4.5)

Maternal current smoking

Yes

189

7.1

(6.2-8.2)

453

14.7

(13.4-16.0)

Paternal current smoking

Yes

399

15.0

(13.7-16.4)

499

16.2

(14.9-17.5)

Premature birth, < 37 weeks

Yes

75

2.8

(2.2-3.5)

75

2.4

(1.9-3.0)

Birth-weight

<2500gr

74

2.8

(2.2-3.5)

105

3.4

(2.8-4.1)

2500-3999gr

1937

72.9

(71.2-74.6)

2196

71.1

(69.5-72.7)

≥4000gr

623

23.4

(21.8-25.1)

691

22.4

(20.9-23.9)

Breastfeeding now

Yes

2481

93.4

(92.4-94.3)

1114

36.1

(34.4-37.8)

Number of siblings

0

1172

44.1

(42.2-46.0)

1343

43.5

(41.7-45.3)

1

920

34.6

(32.8-36.5)

1033

33.5

(31.8-35.2)

2 or more

533

20.1

(18.6-21.6)

711

23.0

(21.6-24.6)

Any kind of infection, child

Yes

903

34.0

(32.2-35.8)

2983

96.6

(95.9-97.2)

Antibiotics ever, child

Yes

58

2.2

(1.7-2.8)

706

22.9

(21.4-24.4)

mean

range

SD

mean

range

SD

Maternal age

30.1

17-48

4.49

29.98

17-48

4.46


a Number of missing varies

Saunes et al. BMC Dermatology 2011 11:11   doi:10.1186/1471-5945-11-11

Open Data