Table 1 General characteristics of the study population among 9-year-old children (n = 4568)
From: Sociodemographic factors and social media use in 9-year-old children: the Generation R Study
| Â | Â | Total n (%) | Missing n (%) |
|---|---|---|---|
Family characteristics | |||
 Maternal educational level | High | 1309 (31.6) | 426 (9.3) |
Mid-high | 1199 (28.9) | Â | |
Mid-low | 1222 (29.5) | Â | |
Low | 412 (10.0) | Â | |
 Paternal educational level | High | 1369 (36.0) | 767 (16.8) |
Mid-high | 922 (24.3) | Â | |
Mid-low | 1000 (26.3) | Â | |
Low | 510 (13.4) | Â | |
 Maternal employment status | Paid job | 3098 (78.6) | 628 (13.7) |
No paid job | 842 (21.4) | Â | |
 Paternal employment status | Paid job | 3537 (95.3) | 857 (18.8) |
No paid job | 174 (4.7) | Â | |
 Net household incomea | >€3200/month | 2415 (55.7) | 234 (5.1) |
€2000–€3200/month | 959 (22.1) |  | |
<€2000/month | 960 (22.2) |  | |
 Financial difficulties | No | 3631 (80.5) | 55 (1.2) |
Yes | 882 (19.5) | Â | |
 Marital status | Married/cohabiting | 3584 (86.9) | 442 (9.7) |
No partner | 542 (13.1) | Â | |
Child characteristics | |||
 Gender | Girl | 2304 (50.4) | 0 |
Boy | 2264 (49.6) | Â | |
 Age year, mean (SD) |  | 9.72 ± 0.32 | 0 |
 Siblings | Yes | 3770 (83.4) | 48 (1.1) |
No | 750 (16.6) | Â | |
 Ethnic background | Dutch | 2796 (61.9) | 54 (1.2) |
Other western | 396 (8.8) | Â | |
Non-western | 1322 (29.3) | Â | |
Season when completing questionnaire | |||
| Â | Spring | 1282 (28.1) | 0 |
| Â | Summer | 985 (21.6) | Â |
| Â | Autumn | 1038 (22.7) | Â |
| Â | Winter | 1263 (27.6) | Â |
Social media use | |||
 Instant messaging | Yes | 1335 (29.3) | 17 (0.4) |
No | 3216 (70.7) | Â | |
  Social network site | Yes | 747 (16.4) | 22 (0.5) |
No | 3799 (83.6) | Â | |