Table 1 Characteristics of study population (N = 1454)
Characteristics | n/N | (%) |
|---|---|---|
Parental atopy (Yes) | 749/1454 | 51.5 |
Gender (Boys) | 721/1454 | 49.6 |
Presence of pets at 3 months (Yes) | 674/1454 | 46.3 |
Presence of moulds at 1 year (Yes) | 386/1454 | 26.5 |
Breastfeeding >12 weeks (Yes) | 772/1449 | 53.3 |
Overweight at 3 years | ||
Yes | 95/1454 | 6.5 |
No | 1122/1454 | 77.1 |
Unknown | 237/1454 | 16.3 |
Gas cooking (Yes) | 1204/1448 | 83.1 |
Older siblings (Yes) | 727/1454 | 50.0 |
Parental education | ||
Low | 125/1454 | 8.6 |
Intermediate | 464/1454 | 31.9 |
High | 864/1454 | 59.5 |
Region | ||
North | 454/1454 | 31.1 |
Middle | 633/1454 | 43.6 |
Western | 367/1454 | 25.2 |
Ethnicity (Dutch) | 1322/1435 | 92.1 |
Active smokers (14/17 years) | 193/1454 | 13.2 |
N (Mean (Range)) | ||
Maternal age at birth (years) | 1438 (31.1 (18–42)) | |
Outdoor NO2 at home address at birth (μg/m3) | 1448 (22.8 (9.2–59.6)) | |