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 |