Table 1.
Characteristics of the households and mother-child pairs that performed the SDQ and CANTAB tests
| Characteristics of the follow-up examination | |
| Time of examination | |
| Morning (before 12 pm) | 68 (39.3) |
| Afternoon (from 12 to 4 pm) | 97 (56.1) |
| Late afternoon (after 4 pm) | 8 (4.6) |
| Season of examination | |
| Spring | 47 (27.2) |
| Summer | 44 (25.4) |
| Autumn | 43 (24.9) |
| Winter | 39 (22.5) |
| Characteristics of the child | |
| Age at follow-up, years | 4.5 ± 0.3 |
| Sex, boy | 87 (50.3) |
| Time spent watching television/playing games | |
| None to less than 1 hour/day | 57 (32.9) |
| 1-2 hours/day | 96 (55.5) |
| >2 hours/day | 14 (8.1) |
| Missing information | 6 |
| Characteristics of the mother | |
| Age of the mother at follow-up visit, years | 35.1 ± 3.8 |
| Educational level | |
| Low (no high school diploma) | 5 (2.9) |
| Middle (high school diploma) | 38 (22.0) |
| High (college degree or higher) | 130 (75.1) |
| Characteristics of the household | |
| Smoking | |
| Non-smoker parents | 128 (74.0) |
| One or both parents smoked | 36 (20.8) |
| Missing information | 9 |
| Number of household members | 4 ± 0.8 |
| Presence of furry pets, yes | 82 (47.1) |
| Passive ventilation, yes | 140 (80.5) |
| Characteristics of the dust sampling | |
| Age of child, during sampling | 4.8 ± 0.6 |
| Duration of sampling (days) | 43.4 ± 5.6 |
| Sampling average outdoor temperature (°C) | 16.7 ± 1.9 |
| Sampling average ambient airborne BC concentration (μg/m3) | 0.7 ± 0.2 |
Continuous variables presented as mean ± sd and categorical variables as n (%)