Table 3.
Multi-level regression effects of Time (Pre- to Post-treatment) and Condition by Timea for primary and secondary outcomes and mechanism of change variables
| B | t | pr | p | d | |
|---|---|---|---|---|---|
| Primary Outcomes | |||||
| GAD CSR | |||||
| Time | -.37 | -1.07 | 0.35 | .292 | .30 |
| Condition X Time | -2.19 | -4.78 | 0.21 | <.001 | 1.32 |
| PSWQ | |||||
| Time | -3.09 | -2.98 | 0.75 | .005 | .83 |
| Condition X Time | -8.45 | -3.66 | 1.78 | .001 | 1.02 |
| DASS-Anxiety | |||||
| Time | -1.75 | -.88 | 1.13 | .385 | .25 |
| Condition X Time | -5.26 | -1.91 | 1.16 | .062 | .53 |
| DASS-Stress | |||||
| Time | 2.93 | .89 | 0.96 | .378 | .25 |
| Condition X Time | -13.01 | -3.29 | 1.13 | .002 | .92 |
| Secondary Outcomes | |||||
| BDI | |||||
| Time | -3.17 | -2.58 | 1.19 | .013 | .72 |
| Condition X Time | -8.56 | -3.80 | 1.96 | .001 | 1.06 |
| QOLI | |||||
| Time | -.11 | -.30 | 1.55 | .801 | .07 |
| Condition X Time | 1.27 | 2.00 | 0.41 | .051 | .56 |
| # of add. diagnoses | |||||
| Time | .14 | .62 | 0.28 | .537 | .17 |
| Condition X Time | -.56 | -1.94 | 0.21 | .058 | .54 |
| Mechanism of Change | |||||
| AAQ | |||||
| Time | -.93 | -.55 | 1.11 | .586 | .15 |
| Condition X Time | -16.86 | -4.21 | 1.16 | <.001 | 1.18 |
| MAAS | |||||
| Time | .08 | .05 | 0.99 | .965 | .02 |
| Condition X Time | 8.38 | 2.94 | 0.86 | .007 | 1.04 |
Note. GAD= generalized anxiety disorder, CSR = Clinician’s Severity Rating from the Anxiety Disorders Interview Schedule for DSM-IV, Lifetime Version; PSWQ = Penn State Worry Questionnaire; DASS-Anxiety = Depression and Anxiety Stress Scales- Anxiety subscale; DASS-Stress = Depression and Anxiety Stress Scales- Stress subscale; BDI = Beck Depression Inventory; QOLI = Quality of Life Inventory; AAQ = Acceptance and Action Questionnaire; MAAS = Mindful Attention and Awareness Scale.
a
Waiting list control is the reference condition.