All subjects | 3659 | 18274 | 3.61 | | | 1.48 | | | 2.24 | | |
Sex | | | | | | | | | | | |
Males | 1894 | 9464 | 3.38 | 1.00 | | 1.37 | 1.00 | | 2.21 | 1.00 | |
Females | 1765 | 8809 | 3.86 | 1.15 | 0.71–1.86 | 1.58 | 1.14 | 0.54–2.43 | 2.26 | 1.04 | 0.56–1.92 |
Paternal education | | | | | | | | | | | |
<9 years | 1591 | 7939 | 4.03 | 1.97 | 0.82–4.74 | 2.13 | 6.50 | 0.86–49.24 | 2.01 | 1.13 | 0.41–3.12 |
9–13 years | 1346 | 6726 | 4.16 | 2.15 | 0.89–5.21 | 1.33 | 4.23 | 0.53–33.45 | 2.96 | 1.80 | 0.67–4.82 |
>13 years | 659 | 3288 | 1.83 | 1.00 | | 0.30 | 1.00 | | 1.52 | 1.00 | |
p trend | | | | 0.266 | | | 0.036 | | | 0.772 | |
Paternal smoking | | | | | | | | | | | |
No | 1959 | 9798 | 2.65 | 1.00 | | 1.12 | 1.00 | | 1.53 | 1.00 | |
Yes | 1700 | 8475 | 4.72 | 1.66 | 1.01–2.73 | 1.88 | 1.42 | 0.65–3.08 | 3.06 | 1.99 | 1.05–3.78 |
Maternal smoking | | | | | | | | | | | |
No | 2218 | 11034 | 3.63 | 1.00 | | 1.71 | 1.00 | | 2.08 | 1.00 | |
Yes | 1441 | 7240 | 3.59 | 0.80 | 0.47–1.34 | 1.10 | 0.49 | 0.21–1.16 | 2.48 | 0.96 | 0.50–1.85 |
Presence of mould or humidity in the child’s room | | | | | | | | | | | |
No | 3437 | 17191 | 3.49 | 1.00 | | 1.40 | 1.00 | | 2.23 | 1.00 | |
Yes | 168 | 813 | 4.92 | 1.35 | 0.49–3.72 | 3.69 | 2.38 | 0.71–7.96 | 2.12 | 0.55 | 0.07–3.99 |
Traffic in the area of residence | | | | | | | | | | | |
No | 850 | 4238 | 3.78 | 1.00 | | 1.41 | 1.00 | | 2.35 | 1.00 | |
Light | 1172 | 5858 | 3.58 | 0.99 | 0.52–1.91 | 0.68 | 0.53 | 0.15–1.88 | 2.90 | 1.26 | 0.57–2.75 |
Moderate | 1061 | 5306 | 3.39 | 0.96 | 0.49–1.90 | 1.69 | 1.45 | 0.51–4.11 | 1.88 | 0.80 | 0.33–1.94 |
High | 538 | 2679 | 3.73 | 1.03 | 0.46–2.29 | 2.98 | 2.66 | 0.91–7.79 | 1.11 | 0.44 | 0.12–1.62 |
p trend | | | | 0.984 | | | 0.030 | | | 0.153 | |
Daily truck transit | | | | | | | | | | | |
Never or seldom | 2761 | 13785 | 3.92 | 1.00 | | 1.37 | 1.00 | | 2.53 | 1.00 | |
Sometimes | 608 | 3064 | 0.65 | 0.16 | 0.04–0.68 | 0.65 | 0.47 | 0.11–2.04 | 0.00 | – | – |
Often | 214 | 1043 | 7.67 | 1.87 | 0.89–3.94 | 5.72 | 3.79 | 1.51–9.54 | 3.80 | 1.50 | 0.53–4.22 |
p trend | | | | 0.858 | | | 0.054 | | | 0.354 | |
| | | | | | | | | | | |
NO2 recorded at the school† | | | | | | | | | | | |
Effect per 10 μg/m3 NO2 increase | 2947 | | | 1.28 | 0.98–1.68 | | 1.56 | 0.96–2.56 | | 1.10 | 0.80–1.51 |
1st quartile (24–35 μg/m3) | 842 | 4242 | 2.83 | 1.00 | | 1.39 | 1.00 | | 1.74 | 1.00 | |
2nd quartile (35–47 μg/m3) | 841 | 4209 | 2.85 | 1.06 | 0.45–2.53 | 0.37 | 0.55 | 0.08–3.61 | 2.21 | 1.34 | 0.51–3.21 |
3rd quartile (47–52 μg/m3) | 615 | 3088 | 4.21 | 1.57 | 0.59–4.13 | 1.62 | 1.25 | 0.25–6.24 | 2.59 | 1.58 | 0.35–4.10 |
4th quartile (52–66 μg/m3) | 649 | 3250 | 4.31 | 1.95 | 0.81–4.71 | 2.77 | 3.04 | 0.67–13.79 | 1.85 | 1.24 | 0.64–3.08 |
p trend | | | | 0.096 | | | 0.159 | | | 0.535 | |