Table 2. Descriptive statistics for risk factors.

Risk Factor	% at risk in sample	n at risk in sample	Average additional risks
Study Child
Study Child Indigenous statusa	3.8	187	4.0
Low birthweight	6.5	317	2.9
Child in lowest quintile of school readiness	15.2	760	3.0
Child temperament in least persistent quintile	11.8	589	3.2
Child temperament in most reactive quintile	12.4	618	3.0
Mother
Teenage mother at birth of study child	2.9	144	4.0
Mother K6 symptomatic	16.2	665	3.2
Mother year 11 education or less	39.2	1937	2.7
Mother unemployed	43.3	2159	2.6
Low parenting consistency	14.8	728	3.4
Family
Mother non-English speaking	15.7	778	2.7
Four or more siblings	4.1	206	3.8
Family in lowest quintile for income	17.5	818	3.7
Healthcare card	22.0	1095	3.5
Most disadvantaged quintile for neighbourhood disadvantage	21.9	1091	2.9
Child not read to all in last week	3.6	182	4.2

^a Study child is of Aboriginal or Torres Strait Islander descent