Table 2

Demographic characteristics for each age group

Demographic characteristicInfant cohortChild cohort
0–1 y2–3 y4–5 y6–7 y
N=5107N=4606N=4983N=4464
Child gender (male)n (%)2618 (51.3)2359 (51.2)2552 (51.2)2288 (51.3)
Single parent familyn (%)538 (10.5)610 (13.3)735 (14.9)749 (16.8)
Language other than English spoken at homen (%)656 (12.8)562 (12.2)698 (14.0)658 (14.8)
Aboriginal or Torres Strait Islander originn (%)251 (4.9)236 (5.1)196 (3.9)169 (3.8)
Child age (months)Mean (SD)8.9 (2.6)34.0 (3.0)57.0 (2.7)82.1 (3.0)
Age of child's primary carer (y)Mean (SD)31.0 (5.7)33.1 (5.7)34.6 (5.5)36.8 (5.6)
Years of education, motherMean (SD)14.5 (2.6)14.5 (2.6)14.1 (2.6)14.2 (2.6)
Years of education, fatherMean (SD)14.6 (2.4)14.7 (2.4)14.6 (2.5)14.6 (2.5)