Table 1 Sociodemographic characteristics of families at 2-year postnatal in the Elfe birth cohort
N | % | Weighted % | ||
|---|---|---|---|---|
Overall sample | 13,117 | 100,0 | 100,0 | |
Maternal age | ||||
≤ 30 years | 4,216 | 32.2 | 38.7 | |
31–40 years | 8,112 | 61.9 | 55.2 | |
> 40 years | 774 | 5.9 | 6.1 | |
Missing | 15 | 0.1 | ||
Mother educational attainment | ||||
Below high school | 2,265 | 17.3 | 29.2 | |
Completed high school-2 years university | 5,275 | 40.2 | 39.2 | |
≥ 3 years university | 5,312 | 40.5 | 31.6 | |
Missing | 265 | 2.0 | ||
Father educational attainment | ||||
Below high school | 3,008 | 22.9 | 33.6 | |
Up to 2 years university | 4,600 | 35.1 | 37.9 | |
≥ 3 years university | 4,175 | 31.8 | 28.4 | |
Missing | 1,334 | 10.2 | ||
Type of household | ||||
Parents living together | 12,529 | 95.5 | 92.0 | |
Parents not living together | 571 | 4.4 | 8.0 | |
Missing | 17 | 0.1 | ||
Parental migration status | ||||
No immigrant parent | 10,850 | 82.7 | 74.1 | |
1 immigrant parent | 1,585 | 12.1 | 15.2 | |
2 immigrant parents | 665 | 5.1 | 10.7 | |
Missing | 17 | 0.1 | ||
Household income | ||||
First quintile | 2,414 | 18.4 | 31.3 | |
Second quintile | 2,530 | 19.3 | 21.5 | |
Third quintile | 2,441 | 18.6 | 17.3 | |
Fourth quintile | 2,473 | 18.9 | 15.9 | |
Fifth quintile | 2,523 | 19.2 | 14.0 | |
Missing | 736 | 5.6 | ||
Parental employment status | ||||
Both employed | 9,895 | 75.4 | 70.1 | |
Only father employed | 1,854 | 14.1 | 21.4 | |
Only mother employed | 494 | 3.8 | 4.5 | |
Both inactive | 253 | 1.9 | 4.0 | |
Missing | 621 | 4.7 | ||
Area of residence | ||||
Urban | 8,141 | 62.1 | 64.0 | |
Suburban | 4,480 | 34.2 | 32.4 | |
Isolated | 418 | 3.2 | 3.6 | |
Missing | 78 | 0.6 | ||
Birth order | ||||
First born | 5,940 | 45.3 | 42.7 | |
Later born | 7,177 | 54.7 | 57.4 | |
Child sex | ||||
Boy | 6,659 | 50.8 | 50.5 | |
Girl | 6,458 | 49.2 | 49.5 | |
Season of survey | ||||
Spring | 1,998 | 15.2 | 21.9 | |
Summer | 3,350 | 25.5 | 26.4 | |
Autumn | 3,762 | 28.7 | 26.5 | |
Winter | 4,007 | 30.5 | 25.3 | |
Number of siblings | ||||
0 | 4,988 | 38.0 | 36.1 | |
1–2 | 7,415 | 56.5 | 57.0 | |
> 2 | 713 | 5.4 | 6.9 | |
Missing | 1 | 0.0 | ||
Type of childcare | ||||
Parents | 3,759 | 28.7 | 38.3 | |
Grand parents | 581 | 4.4 | 4.3 | |
Childminder/nanny | 5,894 | 44.9 | 37.4 | |
Day-care centre | 2,882 | 22.0 | 20.0 | |
Missing | 1 | 0.0 | ||
Adherence to the no-screen guideline | 1,809 | 13.8 | 13.5 | |
Mean maternal screen time (min/day) | 12,874 | 153 | 161 (158–165) | |
Mean paternal screen time (min/day) | 10,653 | 155 | 157 (154–160) | |