Table 2

Demographics of the New Zealand Asthma and Allergy Cohort

Christchurch

Wellington

Total


Total number of children recruited

552

553

1105

Total number with 3 month questionnaire data

535 (96.9%)

529 (95.7%)

1064 (96.3%)

Total number with 15 month questionnaire data

505 (91.4%)

506 (91.5%)

1011 (91.4%)

Male:Female (ratio %)

283:269 (51.3:48.7)

278:275 (50.3:49.7)

561:544 (50.8:49.2)

First born

41.3%

50.5%

45.9%

Second born

37.0%

34.0%

35.5%

Third + born

21.7%

15.6%

18.6%

Number of multiple births

10

2

12

Gestation: Mean (range)

39.6 (33.0–43.0)

39.6 (32.0–43.0)

39.6 (32.0–43.0)

Maternal age at birth: Mean (range)

29.9 (16.3–46.7)

30.3 (15.5–45.6)

30.1 (15.5–46.7)

Percentage Maori Children† *

11.6%

18.9%

15.2%

Percentage with Maori Mother *

5.6%

9.4%

7.5%

Family history† § n = 1046

85.2%

82.9%

84.0%

Smoking during pregnancy †

21.1%

20.8%

21.0%

Household smoking †

33.6%

31.8%

32.7%

Cord blood obtained

91.7%

87.5%

89.6%


† Collected at age 3 months

* Maori has been defined to include both sole Maori and Maori plus other ethnicity, using questions derived from the 1996 New Zealand Census.

§Family history has been defined to include either parent with asthma, hayfever or eczema. Fathers not living with the child were not asked this question

Epton et al. BMC Public Health 2007 7:26   doi:10.1186/1471-2458-7-26

Open Data