Table 1 Characteristics of 10 year old Oslo children with otitis media, tonsillopharyngitis, and lower respiratory infections.
| Characteristics | Otitis media | Tonsillopharyngitis | Lower respiratory infections | Total study population |
|---|---|---|---|---|
| n = 470 | n = 737 | n = 275 | n = 3406 | |
| Gender | ||||
| Female | 53.0 | 51.6 | 44.7 | 49.1 |
| Male | 47.0 | 48.4 | 55.3 | 50.9 |
| Atopic disease | ||||
| Child | 26.8 | 26.3 | 41.6 | 21.6 |
| Parents | 62.3 | 60.4 | 67.2 | 56.8 |
| Siblings | ||||
| Yes | 88.3 | 88.6 | 85.1 | 87.7 |
| No | 11.7 | 11.4 | 14.9 | 12.3 |
| Smoking by care‐giver | ||||
| Yes | 30.9 | 29.3 | 31.6 | 28.8 |
| No | 69.1 | 70.7 | 68.4 | 71.2 |
| Home dampness | ||||
| Yes | 37.4 | 39.2 | 38.9 | 32.7 |
| No | 62.6 | 60.8 | 61.1 | 67.3 |
| Maternal education | ||||
| <12 years | 44.7 | 44.1 | 44.0 | 42.9 |
| 12–15 years | 28.1 | 26.9 | 25.8 | 28.2 |
| >15 years | 24.7 | 27.3 | 25.8 | 27.1 |
| Parental ethnicity | ||||
| Caucasian | 75.3 | 61.3 | 44.0 | 78.7 |
| African | 8.3 | 8.8 | 9.5 | 6.4 |
| Asian | 13.8 | 15.9 | 9.5 | 13.0 |
The figures are given as percentages of affected participants in each category.