Table 2

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

Socioeconomic characteristicsJoint effect*Effect of disability Effect of socioeconomic factors Excess effect§ Test for interaction
Coeff95% CICoeff95% CICoeff95% CICoeff95% CIp 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 −4.00.4−4.0 to 4.9
 60+−4.5−7.5 to −1.6−4.5−7.5 to −1.6000.663
Sex
 Men−5.4−8.5 to −2.3−5.4−8.5 to −2.300
 Women−6.1−8.9 to −3.2−4.9−7.8 to −2.1−1.2−1.9 to −2.30.4−3.8to 4.70.836
Country of birth
 Australia−5.8−8.2 to −3.4−5.8−8.2 to −3.400
 Other−3.5−7.6 to 0.7−2.9−7.1 to 1.3−0.5−1.4 to 0.32.9−1.9 to 7.70.240
Education
 Bachelor or higher−3.6−7.9 to −0.8−3.6−7.9 to −0.800
 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  2.80.581
Employment
 Employed−4.7−7.2 to −2.3−4.7−7.2 to −2.300
 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 −2.10.4−0.5 to 1.3−1.1−5.6 to 3.40.629
Income
 Q5 (highest)−1.1−4.9 to 2.7−1.1−4.9 to  2.700
 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 −4.30.034
Wealth
 High−4.3−7.5 to −1.0−4.3−7.5 to −1.000
 Medium−6.3−9.5 to −3.0−4.0−7.3 to −0.7−2.3−3.0 to −1.50.2−4.4 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 2.10.388
Financial hardship
 Prosperous/very comfortable−3.4−9.4 to 2.6−3.4−9.4 to  2.600
 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 4.10.675
Housing tenure
 Outright owner−5.2−8.8 to −1.5−5.2−8.8 to −1.500
 Mortgager−7.6−11.0 to −4.2−5.2−8.6 to −1.8−2.5−3.3 to −1.60.0−5.0 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 9.90.500
Housing affordability
 Affordable−4.7−6.9 to −2.6−4.7−6.9 to −2.600
 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 4.00.265
Relationship
 Yes−3.7−6.1 to −1.4−3.7−6.1 to −1.400
 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 −0.40.033
Children
 Yes−5.4−8.0 to −2.9−5.4−8.0 to −2.900
 No−7.7−11.3 to −4.1−5.0−8.6 to −1.4−2.7−3.4 to −2.00.4−4.0 to 4.90.851
  • *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.