Total |
2568 (100%) |
Sex |
|
female |
1257 (48.9) |
male |
1311 (51.1) |
Age, years |
|
1 |
424 (16.5) |
2 |
405 (15.8) |
3 |
411 (16.0) |
4 |
400 (15.6) |
5 |
415 (16.2) |
6-7 |
513 (20.0) |
Family socioeconomic status |
|
Low
|
667 (26.1)
|
Medium or high
|
1889 (73.9)
|
Maternal smoking during pregnancy |
|
Yes
|
364 (14.2)
|
No
|
2199 (85.8)
|
Second-hand smoke exposure during pregnancy |
|
Yes
|
101 (5.11)
|
No
|
1874 (94.9)
|