Table 4 Data from the maternal questionnaires
Variables | O. south | O. east | O. center | O. west | P. (KW) | |
|---|---|---|---|---|---|---|
% | % | % | % | |||
Gender | Boys | 49.7 | 49.2 | 55.2 | 48.3 | |
Girls | 50.3 | 50.8 | 44.8 | 51.7 | ||
Delivery | Sectio Caesarea | 17.4 | 16.4 | 19.4 | 18.7 | |
Phototherapy* | 5.5 | 1.6 | 7.2 | 4.4 | = 0.028 | |
Birth weight | Mean (grams) | 3380 | 3380 | 3380 | 3399 | |
SD (grams) | 478 | 492 | 481 | 455 | ||
Age of mothers at delivery | <20 years | 4.2 | 5.5 | 6.0 | 3.4 | |
20 to 30 years | 64.7 | 68.9 | 67.0 | 67.8 | ||
>30 years | 31.0 | 25.7 | 27.0 | 28.8 | ||
Mother’s education | Low | 9.1 | 16.4 | 10.1 | 5.1 | |
Middle | 40.2 | 38.3 | 35.1 | 29.7 | ||
High | 50.7 | 45.4 | 54.9 | 65.2 | ||
Breastfeeding | Breast fed | 92.8 | 86.3 | 93.7 | 92.9 | = 0.009 |
Months – mean | 8.7 | 7.6 | 8.8 | 11.0 | ||
Months – SD | 9.1 | 8.1 | 9.1 | 20.9 | ||
Smoking of mothers | During pregnancy | 12.0 | 17.5 | 18.1 | 9.1 | |
During the study | 31.5 | 32.2 | 35.6 | 23.6 | = 0.019 | |
Exposure to ETS* | Any adult | 48.6 | 54.6 | 49.9 | 42.7 | |
Type of flat | Family house | 11.0 | 55.0 | 3.0 | 15.5 | < 0.001 |
(in the 1st year) | Brick block flats | 23.6 | 36.8 | 36.0 | 36.1 | |
Concrete block flats | 65.5 | 8.2 | 61.0 | 48.5 | ||
Type of heating | Distant | 65.5 | 8.2 | 61.0 | 48.5 | < 0.001 |
Gas | 16.0 | 48.3 | 15.4 | 13.1 | ||
Coal/wood | 2.8 | 30.2 | 2.1 | 2.8 | ||
Mold in flat | Yes | 24.2 | 36.8 | 12.9 | 18.9 | < 0.001 |
Gas appliances in flat | Yes | 86.6 | 66.3 | 90.8 | 89.8 | < 0.001 |
Other children under 14 | Yes | 51.5 | 55.7 | 48.9 | 41.2 | |
Family history of allergies | Mother | 37.2 | 44.8 | 34.2 | 33.1 | |
Father | 21.1 | 23.0 | 25.0 | 28.7 | ||
Siblings | 20.9 | 31.1 | 26.1 | 26.4 | = 0.016 | |
Pets | Cat | 6.4 | 9.8 | 5.2 | 4.7 | |
Dog | 20.9 | 19.1 | 17.5 | 20.9 | ||
Birds | 7.2 | 8.2 | 6.0 | 7.8 | ||
Other* | 23.6 | 20.8 | 21.8 | 22.0 | ||
Day care | 3rd and 4th year | 56.8 | 40.4 | 52.7 | 63.5 | < 0.001 |
4th and 5th year | 89.3 | 72.9 | 89.9 | 92.9 | < 0.001 | |