Table 1.
Baseline characteristics (N (%)) of children included in the analysis, overall and by year of entry to primary school
| N | All | 2010 | 2011 | 2012 | |
|---|---|---|---|---|---|
| 10409 | 2964 | 3573 | 3872 | ||
| Age (years) | 4-4.5 | 363 (3.5%) | 159 (5.4%) | 102 (2.9%) | 102 (2.6%) |
| 4.5-5 | 4846 (46.6%) | 1336 (45.1%) | 1708 (47.8%) | 1802 (46.5%) | |
| 5-5.5 | 4789 (46.0%) | 1368 (46.2%) | 1623 (45.4%) | 1798 (46.4%) | |
| >5.5 | 411 (3.9%) | 101 (3.4%) | 140 (3.9%) | 170 (4.4%) | |
| Gender | F | 4992 (48.0%) | 1388 (46.8%) | 1740 (48.7%) | 1864 (48.1%) |
| M | 5417 (52.0%) | 1576 (53.2%) | 1833 (51.3%) | 2008 (51.9%) | |
| Glasgow SIMD quintile |
5 (least deprived) | 1509 (14.5%) | 507 (17.1%) | 480 (13.4%) | 522 (13.5%) |
| 4 | 1736 (16.7%) | 525 (17.7%) | 561 (15.7%) | 650 (16.8%) | |
| 3 | 2034 (19.5%) | 568 (19.2%) | 729 (20.4%) | 737 (19.0%) | |
| 2 | 2270 (21.8%) | 625 (21.1%) | 777 (21.7%) | 868 (22.4%) | |
| 1 (most deprived) | 2860 (27.5%) | 739 (24.9%) | 1026 (28.7%) | 1095 (28.3%) | |
| Ethnicity | Ethnicity missing | 3813 | 1474 | 1473 | 866 |
| White-UK | 4511 (68.4%) | 1026 (68.9%) | 1470 (70.0%) | 2015 (67.0%) | |
| Other | 2085 (31.6%) | 464 (31.1%) | 630 (30.0%) | 991 (33.0%) | |
| Under statutory parental supervision |
Statutory parental supervision missing |
454 | 0 | 454 | 0 |
| Under statutory parental supervision |
227 (2.3%) | 62 (2.1%) | 97 (3.1%) | 68 (1.8%) | |
| Not under statutory parental supervision |
9728 (97.7%) | 2902 (97.9%) | 3022 (96.9%) | 3804 (98.2%) |