Table 2:
Difference-in-differences analyses for physical and mental health quality of life
| Coefficient estimate (β) | SE | p-value | |
|---|---|---|---|
| Model 1: PCS score | |||
| Intercept | 58.52 | 0.32 | <0.001* |
| SES group | −1.60 | 0.18 | <0.001* |
| Time | 0.21 | 0.07 | 0.004* |
| SES group × Time | −0.15 | 0.17 | 0.392 |
| Decreased income | 0.12 | 0.20 | 0.554 |
| Employment terminated/redundancy/ceased operation of business | −0.02 | 0.31 | 0.947 |
| Claimed JobKeeper/employer claimed JobKeeper on behalf | 0.28 | 0.19 | 0.136 |
| Received Coronavirus Supplement from government | −0.17 | 0.30 | 0.575 |
| Model 2: MHI-5 score | |||
| Intercept | 59.11 | 0.66 | <0.001* |
| SES group | −2.77 | 0.38 | <0.001* |
| Time | −1.71 | 0.14 | <0.001* |
| SES group × Time | 1.07 | 0.32 | <0.001* |
| Decreased income | −0.64 | 0.42 | 0.124 |
| Employment terminated/redundancy/ceased operation of business | −2.31 | 0.65 | <0.001* |
| Claimed JobKeeper/employer claimed JobKeeper on behalf | 0.22 | 0.40 | 0.573 |
| Received Coronavirus Supplement from government | −4.15 | 0.63 | <0.001* |
| Model 3: MCS score | |||
| Intercept | 37.93 | 0.41 | <0.001* |
| SES group | −1.33 | 0.24 | <0.001* |
| Time | −1.22 | 0.09 | <0.001* |
| SES group × Time | 0.55 | 0.21 | 0.009* |
| Decreased income | −0.44 | 0.26 | 0.089 |
| Employment terminated/redundancy/ceased operation of business | −1.52 | 0.40 | <0.001* |
| Claimed JobKeeper/employer claimed JobKeeper on behalf | 0.24 | 0.25 | 0.324 |
| Received Coronavirus Supplement from government | −2.65 | 0.39 | <0.001* |
* p < 0.05.
See Supplementary Material S1 for the mathematical equation on the difference-in-differences models. Models were adjusted for additional covariates including age, sex, household type, marital status, employment, highest education achieved and long-term health conditions.
Abbreviation: MCS = Mental Component Summary; MHI-5 = Mental Health Index-5; PCS = Physical Component Summary; SE = standard error; SES = socio-economic status.