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Table 1 Demographic characteristics of participants at 2 years of age

From: The impact of pre- and postnatal exposures on allergy related diseases in childhood: a controlled multicentre intervention study in primary health care

Characteristic

Intervention cohort N = 1374

Control cohort N = 4780

 

Mean (SD)

Mean (SD)

Age mother at delivery (years)

29.8 (4.21)

29.3 (4.68)

Educationa mother (years)

15.8 (2.43)

15.5 (2.58)

Educationa father (years)

15.1 (2.77)

15.0 (2.97)

Birthweight (grams)

3601 (545)

3582 (594)

 

n (%)

n (%)

Boys

667 (49.3)

2389 (50.0)

One or more sibling

915 (67.4)

3265 (69.3)

Premature

162 (11.9)

671 (14.4)

Single mother

50 (3.8)

356 (7.7)

Breast fed ≥6 months

1053 (76.9)

3285 (69.3)

Smoking mother at start pregnancy

186 (13.8)

862 (18.6)

Smoking father at start pregnancy

205 (15.7)

917 (21.3)

Atopyb mother

652 (47.8)

1991 (42.4)

Atopyb father

578 (42.3)

1725 (36.8)

Atopy mother and father

304 (22.3)

865 (18.4)

Dog in dwelling

104 (7.6)

365 (7.7)

Cat in dwelling

150 (11.0)

397 (8.4)

Homeowner

1247 (91.4)

4118 (87.4)

  1. a Education data is based on a sample (Intervention cohort: n = 1062. Control cohort: n = 1242).
  2. b Defined as ever having had asthma, allergic rhinoconjunctivitis or AD.