Table 8.

Multi-level regression effects of Time (Pre to Post-treatment) and Condition by Time^a for primary and secondary outcomes and mechanism of change variables in sample with post-treatment data from the two participants who changed medications during treatment dropped (N = 31)

	B	t	pr	p	d
Primary Outcomes
GAD CSR
Time	-0.51	-1.48	0.30	.144	0.79
Condition X Time	-2.03	-4.27	0.24	<.001	1.21
PSWQ
Time	-3.10	-2.75	0.93	.009	0.79
Condition X Time	-7.50	-3.26	1.61	.002	0.93
DASS-Anxiety
Time	-1.08	-0.53	1.07	.600	0.15
Condition X Time	-5.90	-2.05	1.15	.046	0.59
DASS-Stress
Time	4.30	1.25	0.95	.216	0.36
Condition X Time	-14.63	-3.54	1.12	.001	1.18
Secondary Outcomes
BDI
Time	-3.02	-2.24	2.07	.030	0.64
Condition X Time	-8.20	-3.47	1.63	.001	0.99
QOLI
Time	-0.15	-0.34	1.20	.734	0.10
Condition X Time	1.27	1.89	0.44	.064	0.54
# of add. diagnoses
Time	0.07	0.29	0.40	.777	0.08
Condition X Time	-0.43	-1.48	0.25	.145	0.42
Mechanism of Change
AAQ
Time	0.28	0.18	0.97	.861	0.05
Condition X Time	-17.43	-4.19	1.15	<.001	1.20
MAAS
Time	0.19	0.10	0.99	.929	0.03
Condition X Time	7.01	2.37	0.89	0.02	0.87

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.

^aWaiting list control is the reference condition.