Table. Demographic Characteristics.
| Characteristic | Total (N = 4983) |
|---|---|
| Child | |
| Male, No. (%) | 2536 (50.9) |
| Aboriginal or Torres Strait Islander, No. (%) | 187 (3.8) |
| Age, mean (SD), mo | |
| Wave 1 | 56.9 (2.6) |
| Wave 2 | 81.9 (3.0) |
| Wave 3 | 105.6 (2.9) |
| Wave 4 | 129.9 (3.5) |
| Wave 5 | 155.2 (3.8) |
| Maternal (Wave 1) | |
| Age, mean (SD), y | 34.6 (5.3) |
| Educational level, No. (%) | |
| Did not complete high school | 1894 (38.0) |
| Completed high school only | 1624 (32.6) |
| Completed college degree | 1470 (29.5) |
| Main language spoken at home is English, No. (%) | 4168 (83.6) |
| Country of birth is Australia, No. (%) | 3709 (74.4) |
| Family (Wave 1) | |
| No. of siblings in the household, median (IQR) | 1.0 (1.0-2.0) |
| Socioeconomic position, mean (SD)a | 0 (1.0) |
| Sole parent family, No. (%) | 697 (14.0) |
Abbreviation: IQR, interquartile range.
aSocioeconomic position quintile is a composite Longitudinal Study of Australian Children measure derived from standardized scores for combined annual household income, years of parent education, and parent occupation.