Table 2.
Among those in the bottom percentile of SES, percent of the period effect for drug misuse explaineda by mental health and pain measures, by age group and drug type
| Age Group: | Aged 20–49b |
Aged 50–76 |
|||||
|---|---|---|---|---|---|---|---|
| Drug Type: | Any Drug | Sedatives | Any Drug | Cannabis | Prescription Painkillers | Sedatives | Other Drugs |
| Drug misuse | |||||||
| Among those in the bottom 1% of SES, percent of period effect explained by: | |||||||
| Mental health measures (Model 2a) | 25.0 | 21.9 | 13.2 | 7.2 | 18.7 | 20.9 | 18.9 |
| CIDI-SF major depression | 2.8 | 1.6 | 2.4 | 2.0 | 4.3 | 2.7 | 3.0 |
| Negative affect | 14.0 | 15.3 | 6.0 | 1.2 | 9.6 | 12.6 | 9.6 |
| Positive affect | 6.1 | 5.4 | 3.0 | 1.7 | 4.7 | 5.2 | −0.7 |
| Life satisfaction | 4.6 | 2.1 | 2.7 | 3.2 | 1.6 | 2.3 | 7.3 |
| Psychological well-being | −2.5 | −2.4 | −1.0 | −1.4 | 5.8 | −1.7 | 0.3 |
| Social well-being | 3.9 | −0.1 | 0.0 | 0.5 | 6.1 | −0.2 | −0.5 |
| Pain measures (Model 2b) | 45.5 | 35.2 | 24.9 | 14.1 | 59.8 | 37.5 | 35.8 |
| Lower backache | 22.2 | 13.5 | 11.8 | 8.6 | 26.5 | 13.8 | 10.4 |
| Joint aches/stiffness | 23.3 | 21.7 | 13.2 | 5.5 | 33.3 | 23.7 | 25.4 |
| Both mental health and pain (Model 3) | 50.7 | 38.8 | 26.8 | 15.6 | 62.5 | 37.9 | 40.4 |
| CIDI-SF major depression | 2.5 | 1.4 | 3.9 | 1.8 | 3.4 | 2.4 | 2.5 |
| Negative affect | 11.8 | 14.3 | 4.8 | 0.6 | 6.6 | 11.6 | 8.5 |
| Positive affect | 5.1 | 4.9 | 3.0 | 1.3 | 3.0 | 4.6 | −1.5 |
| Life satisfaction | 4.6 | 2.1 | 1.5 | 3.1 | −0.1 | 2.2 | 7.4 |
| Psychological well-being | −2.5 | −2.4 | 0.4 | −1.4 | 0.1 | −1.7 | 0.2 |
| Social well-being | 0.0 | −0.2 | 0.2 | 0.5 | −0.1 | −0.2 | −0.5 |
| Lower backache | 14.9 | 5.6 | 9.6 | 6.2 | 22.2 | 5.4 | 4.8 |
| Joint aches/stiffness | 14.3 | 13.1 | 3.4 | 3.5 | 27.4 | 13.6 | 19.0 |
a
The percent explained by mental health and by pain measures is calculated using the Karlson-Holm-Breen (KHB) method (Karlson et al., 2012) with the Stata user-written program “khb” (Kohler et al., 2011).
b
We do not compute the percent explained in cases where the period effect was not significant (i.e., misuse of cannabis, prescription painkillers and other drugs among those aged 20–49).