Characteristics | No. | Per cent |
---|---|---|
Maternal factors | ||
Age (years)* | ||
≤27 | 62 | 21.6 |
28–31 | 131 | 45.6 |
≥32 | 94 | 32.8 |
Place of residence | ||
Rural | 158 | 55.1 |
Urban | 129 | 44.9 |
Parity | ||
0 | 122 | 42.5 |
≥1 | 165 | 57.5 |
Body mass index (kg/m2) | ||
≤25 | 236 | 82.2 |
>25 | 51 | 17.8 |
Education (years) | ||
≤12 | 91 | 31.7 |
>12 | 196 | 68.3 |
Tobacco smoking at the beginning of pregnancy | ||
No | 216 | 75.3 |
Yes | 71 | 24.7 |
Child factors | ||
Sex | ||
Boy | 139 | 48.4 |
Girl | 148 | 51.6 |
Birth weight (g)* | ||
<3380 | 143 | 49.8 |
≥3380 | 144 | 50.2 |
Education | ||
Nursery school | 214 | 74.6 |
Primary school | 73 | 25.4 |
Smokers at home | ||
0 | 169 | 58.9 |
1 or more | 118 | 41.1 |
Sleep duration (hours per day) | ||
<10.5 | 74 | 25.8 |
10.5–11 | 129 | 44.9 |
>11 | 84 | 29.3 |
Regular extra-curricular sport activities | ||
No | 81 | 28.2 |
Yes | 206 | 71.8 |
*For the sake of clarity, this variable is categorised in the table, but it was introduced into regression models as a continuous variable.