Characteristics of the study cohort
| Characteristic | Study cohort | Full LSAC cohort | ||
|---|---|---|---|---|
| n | % | n | % | |
| Child | 688 | 100 | 4983 | 100 |
| Boys | 335 | 48.7 | 2537 | 50.9 |
| Girls | 353 | 51.3 | 2446 | 49.1 |
| Age (mean; SD) | 4.7 (0.01) | 4.2 (0.38) | ||
| Aboriginal/Torres Strait Islander | 8 | 1.2 | 187 | 3.8 |
| Born in Australia | 658 | 96.2 | 4772 | 95.8 |
| Child's first language is English | 628 | 91.3 | 4359 | 87.5 |
| Parents | ||||
| Completed high school | ||||
| Mother | 394 | 57.9 | 2895 | 58.1 |
| Father | 303 | 50.3 | 2246 | 45.1 |
| University education | ||||
| Mother | 189 | 27.5 | 1408 | 28.3 |
| Father | 158 | 23.0 | 1249 | 25.1 |
| Born in Australia | ||||
| Mother | 514 | 75.7 | 3709 | 75.0 |
| Father | 436 | 72.3 | 3165 | 73.2 |
| Family structure | ||||
| Child lives with | ||||
| Biological mother | 678 | 98.6 | 4914 | 98.6 |
| Both biological parents | 577 | 83.9 | 4130 | 82.9 |
| A non-biological father figure | 12 | 0.02 | 80 | 0.02 |
| Mother's relationship status | ||||
| Married to partner | 536 | 78 | 3751 | 75.3 |
| In de facto relationship | 59 | 8.6 | 693 | 13.9 |
| No partner | 74 | 10.8 | 539 | 10.8 |
| Economic resources | ||||
| Mother works | 391 | 56.8 | 2836 | 57.5 |
| Father works | 570 | 98.5 | 4026 | 93.3 |
| Annual household income | ||||
| $41 599 or less | 177 | 26.1 | 1361 | 29.1 |
| $42 000–$103 999 | 393 | 58.1 | 2526 | 54.2 |
| $104 000 or more | 106 | 15.6 | 776 | 16.6 |
LSAC, Longitudinal Study of Australian Children.