Table 1. Characteristics of the study population.
| Characteristics | |
| Mean (SD) age, years | 30.9 (4.9) |
| Mean (SD) BMI, kg/m2 | 21.2 (3.2) |
| Asthma | |
| No/Yes (%) | 12,890 (89.5)/1,518 (10.5) |
| Allergic rhinitis | |
| No/Yes (%) | 9,359 (65.0)/5,049 (35.0) |
| Atopic dermatitis | |
| No/Yes (%) | 12,134 (84.2)/2,274 (15.8) |
| Allergic conjunctivitis | |
| No/Yes (%) | 12,988 (90.1)/1,420 (9.9) |
| Food allergy | |
| No/Yes (%) | 13,750 (95.4)/658 (4.6) |
| Drug allergy | |
| No/Yes (%) | 14,048 (97.5)/360 (2.5) |
| Smoking during pregnancy | |
| No/Yes (%) | 13,723 (95.2)/685 (4.8) |
| Smoking during pregnancy (partner) | |
| No/Yes (%) | 7,847 (54.5)/6,561 (45.5) |
| Alcohol consumption during pregnancy | |
| No/Yes (%) | 12,959 (89.9)/1,449 (10.1) |
| Own pets | |
| No/Yes (%) | 11,214 (77.8)/3,194 (22.2) |
| Total IgE concentration, IU/mL | |
| ≤173/>173 (%) | 11,133 (77.3)/3,275 (22.7) |
| Mean (SD) metal concentration, ng/g | |
| Cd | 0.75 (0.38) |
| Pb | 6.44 (2.86) |
| Hg | 4.17 (2.41) |
| Se | 171 (20.4) |
| Mn | 15.8 (4.61) |
BMI, body mass index; IgE, immunoglobulin E; SD, standard deviation.