Table 1.
Baseline characteristics of children followed up at age 6.5 years in experimental and control groups. Values are numbers (percentages) unless stated otherwise
| Variable | Experimental group (n=7108) | Control group (n=6781) |
|---|---|---|
| Maternal age (years): | ||
| <20 | 1017 (14.3) | 897 (13.2) |
| 20-34 | 5783 (81.4) | 5598 (82.6) |
| ≥35 | 308 (4.3) | 286 (4.2) |
| Maternal education: | ||
| Incomplete secondary | 310 (4.4) | 202 (3.0) |
| Complete secondary | 2441 (34.3) | 2011 (29.7) |
| Advanced secondary or partial university | 3395 (47.8) | 3693 (54.5) |
| Complete university | 962 (13.5) | 875 (12.9) |
| Older children living in household: | ||
| 0 | 4176 (58.8) | 3695 (54.5) |
| 1 | 2368 (33.3) | 2450 (36.1) |
| ≥2 | 564 (7.9) | 636 (9.4) |
| Positive family history of atopy | 359 (5.1) | 226 (3.3) |
| Maternal smoking during pregnancy | 184 (2.6) | 108 (1.6) |
| Male child | 3653 (51.4) | 3528 (52.0) |
| Mean (SD) birth weight (g) | 3440 (418) | 3441 (423) |