Table 4

Characteristics of the newborns enrolled in the allergic and non-allergic families cohorts

    Allergic Families

    Non-Allergic Families

Characteristic

n

%

N

%

560

100.0

49

100.0


Race or ethnicity*

Hispanic of any race

115

20.8

10

20.4

Black alone

386

69.8

37

75.5

White alone

7

1.3

0

0.0

More than one race

38

6.9

2

4.1

All others

7

1.3

0

0.0

Missing

7

--

0

--

Sex

Male

287

51.2

25

51.0

Female

273

48.8

24

49.0

Gestational age in weeks

34

9

1.6

0

0.0

35

13

2.3

0

0.0

36

25

4.5

1

2.0

37

61

10.9

6

12.2

38

100

17.9

10

20.4

39

173

30.9

15

30.6

40

118

21.1

11

22.4

41

59

10.5

6

12.2

42

2

0.4

0

0.0

Type of delivery

Spontaneous vaginal

342

61.1

31

63.3

Assisted vaginal

43

7.7

4

8.2

Elective c-section

68

12.1

12

24.5

Non-elective c-section

107

19.1

2

4.0

Breastfed at birth

289

57.2

29

61.7

Breastfeeding at 3 mos.

121

24.0

13

27.7

Household tobacco smoke exposure at 3 mos.

263

58.7

23

56.1

Continuous measures

    Mean

    SD

    Mean

    SD

Gestational age (weeks)

38.7

1.5

39.0

1.3

Birthweight (grams)

3236.8

514.4

3211.8

503.9

Length (cm)

50.1

2.5

49.9

2.7

Head circumference (cm)

33.6

1.6

33.3

2.2

5-minute Apgar score

8.9

0.5

8.9

0.5


*Determined by the open-ended question posed to the mother, "How would you describe the race, nationality, or ethnic background of your baby?"

Gern et al. BMC Pulmonary Medicine 2009 9:17   doi:10.1186/1471-2466-9-17

Open Data