Table 6.
Primary outcome measure (parental stress): Standardized parameter estimates (and standard errors), t and p values, and 95% confidence intervals of multilevel models of intervention outcome predicted by measurement point (T2 and T3, deviations from T1), group [intervention (reference) and waitlist control group], control variable (PHQ-4 score at T1), and interaction variables (group by T2 and T3).
| Interaction | |||||||
|---|---|---|---|---|---|---|---|
| Intercept | T2 | T3 | Group | PHQ-4 at T1 | Group x T2 | Group x T3 | |
| Primary outcome measure: Parental stress (PSQ) | |||||||
| - Parent-child relationship problems | |||||||
| β (SE) | -0.16 (0.23) | 0.15 (0.15) | -0.13 (0.12) | -0.06 (0.24) | 0.07 (0.04) | -0.20 (0.22) | 0.01 (0.19) |
| t | -0.72 | 1.03 | -1.09 | -0.23 | 1.64 | -0.94 | 0.07 |
| p | 0.476 | 0.305 | 0.280 | 0.816 | 0.106 | 0.352 | 0.946 |
| 95% CI | (-0.61, 0.29) | (-0.14, 0.44) | (-0.36, 0.11) | (-0.53, 0.42) | (-0.01, 0.15) | (-0.64, 0.23) | (-0.36, 0.38) |
| - Parenting problems | |||||||
| β (SE) | 0.15 (0.24) | -0.14 (0.11) | -0.12 (0.13) | -0.27 (0.25) | 0.01 (0.04) | 0.14 (0.17) | -0.03 (0.20) |
| t | 0.64 | -1.23 | -0.99 | -1.06 | 0.32 | 0.83 | -0.14 |
| p | 0.524 | 0.222 | 0.327 | 0.291 | 0.747 | 0.410 | 0.887 |
| 95% CI | (-0.32, 0.63) | (-0.36, 0.09) | (-0.37, 0.13) | (-0.77, 0.23) | (-0.07, 0.10) | (-0.19, 0.47) | (-0.43, 0.37) |
| - Parental role restriction | |||||||
| β (SE) | -0.72 (0.21) | 0.02 (0.11) | -0.24 (0.11) | 0.59 (0.22) | 0.15 (0.04) | -0.16 (0.16) | 0.02 (0.17) |
| t | -3.45∗∗ | 0.21 | -2.21∗ | 2.71∗∗ | 4.13∗∗∗ | -1.00 | 0.13 |
| p | 0.001 | 0.837 | 0.031 | 0.009 | <0.001 | 0.321 | 0.895 |
| 95% CI | (-1.13, -0.30) | (-0.19, 0.24) | (-0.45, -0.02) | (0.16, 1.03) | (-0.08,0.23) | (-0.47,0.16) | (-0.32,0.37) |
†p < 0.10, ∗p < 0.05, ∗∗p < 0.01, ∗∗∗p < 0.001, SE, standard error; β, Standardized parameter estimate can be interpreted similar to Cohen’s d in case of dichotomous variables, and as Pearson r in case of continuous variables; CI, confidence interval; PSQ, parenting stress questionnaire; PHQ-4, Patient Health Questionnaire – 4.