Table 2

Regression coefficients representing joint and components effects of disability and each socioeconomic factor on the mental health score (n=8323)

Socioeconomic characteristics	Joint effect*		Effect of disability^†		Effect of socioeconomic factors^‡		Excess effect^§		Test for interaction
Socioeconomic characteristics	Coeff	95% CI	Coeff	95% CI	Coeff	95% CI	Coeff	95% CI	p Value
Age (years)
<30	−15.5	−20.0 to −10.9	−6.6	−11.1 to −2.1	−8.9	−10.0 to −7.8	−2.1	−7.5 to 3.4
30–44	−14.3	−18.9 to −9.8	−7.0	−11.5 to −2.5	−7.3	−8.4 to −6.2	−2.5	−7.9 to 2.9
45–69	−9.2	−12.6 to −5.9	−4.1	−7.4 to −0.8	−5.1	−6.3 to −4.0	0.4	−4.0 to 4.9
60+	−4.5	−7.5 to −1.6	−4.5	−7.5 to −1.6	0		0		0.663
Sex
Men	−5.4	−8.5 to −2.3	−5.4	−8.5 to −2.3	0		0
Women	−6.1	−8.9 to −3.2	−4.9	−7.8 to −2.1	−1.2	−1.9 to −2.3	0.4	−3.8to 4.7	0.836
Country of birth
Australia	−5.8	−8.2 to −3.4	−5.8	−8.2 to −3.4	0		0
Other	−3.5	−7.6 to 0.7	−2.9	−7.1 to 1.3	−0.5	−1.4 to 0.3	2.9	−1.9 to 7.7	0.240
Education
Bachelor or higher	−3.6	−7.9 to −0.8	−3.6	−7.9 to −0.8	0		0
Secondary, certificate, diploma	−5.6	−8.6 to −2.6	−4.9	−7.9 to −1.9	−0.7	−1.5 to 0.1	−1.3	−6.6 to 4.0
Did not complete secondary	−8.3	−12.1 to −4.5	−6.6	−10.5 to −2.8	−1.7	−2.6 to −0.7	−3.1	−8.9to 2.8	0.581
Employment
Employed	−4.7	−7.2 to −2.3	−4.7	−7.2 to −2.3	0		0
Unemployed	−17.2	−30.7 to −3.7	−10.9	−24.5 to 2.8	−6.3	−8.6 to −4.1	−6.1	−20.0 to 7.7
Not in the labour force	−5.4	−9.1 to −1.7	−5.9	−9.6 to −2.1	0.4	−0.5 to 1.3	−1.1	−5.6 to 3.4	0.629
Income
Q5 (highest)	−1.1	−4.9 to 2.7	−1.1	−4.9 to 2.7	0		0
Q4	−4.6	−9.0 to −0.3	−4.1	−8.5 to 0.2	−0.5	−1.5 to 0.4	−3.1	−8.9 to 2.7
Q3	−6.1	−10.1 to −2.2	−4.5	−8.6 to −0.5	−1.6	−2.6 to −0.6	−3.5	−9.0 to 2.1
Q2	−8.5	−13.6 to −3.3	−6.3	−11.4 to −1.1	−2.2	−3.2 to −1.2	−5.2	−11.6 to 1.2
Q1 (lowest)	−15.0	−20.9 to −9.1	−12.5	−18.5 to −6.5	−2.5	−3.9 to −1.2	−11.4	−18.5 to −4.3	0.034
Wealth
High	−4.3	−7.5 to −1.0	−4.3	−7.5 to −1.0	0		0
Medium	−6.3	−9.5 to −3.0	−4.0	−7.3 to −0.7	−2.3	−3.0 to −1.5	0.2	−4.4 to 4.9
Low	−13.2	−17.3 to −9.1	−7.4	−11.6 to −3.3	−5.8	−6.7 to −4.9	−3.2	−8.4 to 2.1	0.388
Financial hardship
Prosperous/very comfortable	−3.4	−9.4 to 2.6	−3.4	−9.4 to 2.6	0		0
Reasonably comfortable	−6.5	−9.5 to −3.6	−4.8	−7.6 to −1.9	−1.8	−2.7 to −0.9	−1.4	−8.2 to 5.3
Just getting by/very poor	−12.5	−16.1 to −8.8	−6.3	−10.0 to −2.7	−6.1	−7.2 to −5.1	−3.0	−10.0 to 4.1	0.675
Housing tenure
Outright owner	−5.2	−8.8 to −1.5	−5.2	−8.8 to −1.5	0		0
Mortgager	−7.6	−11.0 to −4.2	−5.2	−8.6 to −1.8	−2.5	−3.3 to −1.6	0.0	−5.0 to 5.0
Private renter	−9.9	−14.2 to −5.6	−4.6	−8.9 to −0.3	−5.3	−6.3 to −4.3	−0.6	−5.0 to 6.2
Public renter	−23.2	−33.8 to −12.6	−14.8	−25.8 to −3.7	−8.4	−11.6 to 5.2	−9.6	−21.3 to 2.1
Other	−10.7	−21.5 to 0.1	−6.9	−18.0 to 4.1	−3.8	−6.1 to −1.4	−1.8	−13.4 to 9.9	0.500
Housing affordability
Affordable	−4.7	−6.9 to −2.6	−4.7	−6.9 to −2.6	0		0
Unaffordable	−13.1	−22.0 to −4.3	−10.0	−18.9 to −1.0	−3.2	−4.6 to −1.7	−5.2	−14.4 to 4.0	0.265
Relationship
Yes	−3.7	−6.1 to −1.4	−3.7	−6.1 to −1.4	0		0
No	−11.5	−15.5 to −7.4	−8.8	−12.9 to −4.8	−2.6	−3.4 to −1.9	−5.1	−9.8 to −0.4	0.033
Children
Yes	−5.4	−8.0 to −2.9	−5.4	−8.0 to −2.9	0		0
No	−7.7	−11.3 to −4.1	−5.0	−8.6 to −1.4	−2.7	−3.4 to −2.0	0.4	−4.0 to 4.9	0.851

*The coefficient represents the joint effect of disability and each category of the covariate on mean mental health score, compared with those with no disability in the baseline socioeconomic category.
†The coefficient represents the effect of disability on mean mental health score, compared with those with no disability, within each category of the covariate.
‡The coefficient represents the effect of each socioeconomic factor on mean mental health score, compared with baseline socioeconomic category, for people with no disability.
§The excess effect is the value of the interaction term on an additive scale, which represents the additional effect of disability and each socioeconomic factor on mean mental health score.