Table 4.
Tobit regression models quantifying the effect of pre-intervention values and engagement with Vitalk as predictors of post-intervention anxiety, depression and stress values.
| Anxiety (0–21) GAD-7 | Depression (0–27) PHQ-9 | Stress (0–42) DASS-21 | |
|---|---|---|---|
| Base Model: No interaction | Standardized coefficients (β) | Standardized coefficients (β) | Standardized coefficients (β) |
| Intercept | 8.1*** | 10.4*** | 17.2*** |
| Pre | 2.2*** | 3.8*** | 3.4*** |
| Engagement | −0.33** | −0.46** | 0.11 |
| Full Model: With interaction | |||
| Intercept | 8.1*** | 10.4*** | 17.2*** |
| Pre | 2.2*** | 3.7*** | 3.4*** |
| Engagement | −0.33** | −0.45** | 0.13 |
| Interaction (Pre:Engagement) | −0.07 | −0.26 | −0.19 |
Pre and engagement variables were standardized by subtracting mean and dividing by the standard deviation.
***
p < 0.001,
**
p < 0.01.