Multiple logistic regression of non-perinatal risk factors for asthma among 16-year-old Finnish adolescents. Crude and adjusted odds ratios (OR) with 95% confidence intervals (CI)3-1
| Non-perinatal risk factors | Proportion of category and total no. | Occurrence of asthma (% and no. affected) |
Crude OR | 95% CI |
Adjusted OR3-2 | 95% CI | Adjusted also for hay fever (OR)3-3 | 95% CI |
| Individual non-perinatal factors | ||||||||
| Sex | ||||||||
| Male | 47.8% | 4.7% (120) | 1.0 | 1.0 | 1.0 | |||
| Female | 52.2% | 3.2% (77) | 0.72 | 0.52 to 0.99 | 0.81 | 0.57 to 1.17 | 0.96 | 0.63 to 1.46 |
| n = 4578 | ||||||||
| Hay fever in the adolescent | ||||||||
| No | 89.1% | 2.0% (79) | 1.0 | |||||
| Yes | 10.9% | 15.7% (77) | 8.60 | 5.93 to 12.47 | ||||
| n = 4496 | ||||||||
| Non-perinatal factors common to both members of the pair | ||||||||
| Parental asthma | ||||||||
| No | 92.1% | 3.2% (107) | 1.0 | 1.0 | 1.0 | |||
| Yes | 7.9% | 14.8% (43) | 5.34 | 3.53 to 8.08 | 4.95 | 3.08 to 7.96 | 4.41 | 2.49 to 7.79 |
| n = 3682 | ||||||||
| Parental hay fever | ||||||||
| No | 71.2% | 3.2% (88) | 1.0 | 1.0 | 1.0 | |||
| Yes | 28.8% | 6.2% (60) | 1.97 | 1.37 to 2.83 | 1.23 | 0.81 to 1.89 | 1.03 | 0.64 to 1.67 |
| n = 3824 | ||||||||
| Number of older siblings | ||||||||
| 0–1 | 77.6% | 4.4% (136) | 1.0 | 1.0 | 1.0 | |||
| 2+ | 22.4% | 2.7% (24) | 0.60 | 0.38 to 0.95 | 0.60 | 0.37 to 0.99 | 0.71 | 0.41 to 1.24 |
| n = 3990 | ||||||||
| Father's occupation | ||||||||
| Farmer | 11.7% | 2.2% (10) | 1.0 | 1.0 | 1.0 | |||
| Other | 88.3% | 4.3% (147) | 1.98 | 1.04 to 3.79 | 1.57 | 0.79 to 3.15 | 1.06 | 0.51 to 2.21 |
| n = 3908 | ||||||||
| Maternal smoking | ||||||||
| Never | 52.5% | 3.2% (76) | 1.0 | 1.0 | 1.0 | |||
| Ever | 47.5% | 4.7% (101) | 1.49 | 1.07 to 2.08 | 1.49 | 1.02 to 2.18 | 1.48 | 0.97 to 2.25 |
| n = 4538 | ||||||||