Gender | | | | | | | | | | | | | | | | |
Boys | 196 | 10 | 1.6 | 1.27 to 2.05 | 150 | 7.9 | 1.1 | 1.05 to 1.77 | 486 | 25 | 1.0 | 0.88 to 1.19 | 396 | 21 | 1.1 | 0.89 to 1.23 |
Girls | 125 | 6.7 | 1.0 | | 112 | 6.0 | 1.0 | | 466 | 25 | 1.0 | | 372 | 20 | 1.0 | |
Heredity* | | | | | | | | | | | | | | | | |
Any | 132 | 12 | 1.8 | 1.41 to 2.27 | 122 | 11 | 2.3 | 1.77 to 2.97 | 352 | 32 | 1.6 | 1.35 to 1.85 | 295 | 26 | 1.6 | 1.38 to 1.93 |
None | 186 | 7.1 | 1.0 | | 135 | 5.2 | 1.0 | | 593 | 22 | 1.0 | | 468 | 18 | 1.0 | |
Maternal age | | | | | | | | | | | | | | | | |
<26 years | 65 | 14 | 1.8 | 1.31 to 2.39 | 58 | 13 | 1.9 | 1.33 to 2.58 | 126 | 27 | 1.1 | 0.88 to 1.39 | 106 | 23 | 1.1 | 0.89 to 1.23 |
≥26 years | 256 | 7.7 | 1.0 | | 204 | 6.2 | 1.0 | | 826 | 25 | 1.0 | | 662 | 20 | 1.0 | |
Maternal smoking† | | | | | | | | | | | | | | | | |
Yes | 66 | 13 | 1.7 | 1.27 to 2.32 | 51 | 10 | 1.4 | 1.01 to 2.00 | 130 | 26 | 1.1 | 0.86 to 1.34 | 113 | 23 | 1.2 | 0.92 to 1.47 |
No | 255 | 7.8 | 1.0 | | 211 | 6.5 | 1.0 | | 821 | 25 | 1.0 | | 654 | 20 | 1.0 | |
Year of construction of home | | | | | | | | | | | | | | | | |
>1961 | 195 | 10 | 1.5 | 1.17 to 1.89 | 164 | 8.7 | 1.6 | 1.25 to 2.13 | 501 | 26 | 1.1 | 0.89 to 1.19 | 407 | 21 | 1.1 | 0.95 to 1.32 |
<1960 | 126 | 6.7 | 1.0 | | 98 | 5.0 | 1.0 | | 450 | 24 | 1.0 | | 361 | 19 | 1.0 | |