Table 2.
Characteristics of the analyzed subcohort (n = 935)
| Number (%) or mean (SD) | |
|---|---|
| Maternal characteristics | |
| Maternal BMI at inclusion | |
| <18.5 | 62 (6.6) |
| 18.5–25 | 720 (76.3) |
| 25–30 | 122 (12.9) |
| ≥30 | 40 (4.2) |
| Maternal age at inclusion (years) | 30.8 (4.1) |
| Nulliparous (vs. multiparous) | 386 (40.9) |
| Maternal level of education | |
| Primary or secondary education | 124 (13.1) |
| Baccalaureate | 161 (17.0) |
| Higher education | 660 (69.8) |
| Maternal smoking at inclusion (vs. no) | 206 (22.0) |
| Maternal alcohol consumption at inclusion (vs no) | 138 (14.7) |
| Family history of allergy (yes) 1 | 249 (26.3) |
| Child’s characteristics | |
| Male gender | 485 (51.3) |
| Cesarean delivery (yes) | 156 (16.8) |
| Exclusive breastfeeding during the first 3 months (yes) | 389 (41.1) |
| Preterm birth (<37 weeks) | 30 (3.2) |
| Low birth weight (<10% for gestational age) | 59 (6.3) |
| Height (cm) | 49.8 (2.2) |
| Weight (g) | 3419 (484) |
| Environmental characteristics | |
| ETS at home since birth (yes) | 329 (34.8) |
| Time spent in rooms cleaned with bleach (yes) | 420 (44.4) |
| Use of glues for renovation activities in the first 2 years of life (vs. no) | 326 (45.0) |
| Use of alkyd/acrylic paints for renovation activities in the first 2 years of life (vs. no) | 459 (48.5) |
| Pets at home since birth | 472 (50.0) |
| Child’s mattress ≥ 3 years | 383 (40.5) |
| Ventilation of the child’s bedroom less than on time/day (vs. no) | 390 (41.2) |
| Individual heating using gas/fuel oil/wood/chimneys (vs. no) | 520 (55.0) |
SD standard deviation, BMI body mass index, ETS environmental tobacco smoke
Missing values: 1—n = 137, n < 40 for other variables