. Author manuscript; available in PMC: 2015 Jun 1.

Published in final edited form as: J Consult Clin Psychol. 2015 Apr 13;83(3):602–616. doi: 10.1037/a0039058

Table 6.

Multilevel Model for Change in Anxiety (BAI) Scores as Moderated by Treatment, Promotion, and Prevention Factors

	Treatment Condition Model				Condition & Promotion Focus Model				Condition & Prevention Focus Model
Fixed Effects	Estimate	Standard Error	t	p	Estimate	Standard Error	t	p	Estimate	Standard Error	t	p
Intercept	16.24	1.85	8.79	< .001	16.24	1.87	8.70	< .001	16.43	1.80	9.13	< .001
Session: Linear	−.58	.14	4.01	< .001	−.55	.15	3.67	.001	−.53	.16	3.43	.001
Condition	−2.89	2.58	1.12	.268	−2.87	2.58	1.11	.271	−3.53	2.54	1.39	.171
Condition x Session	−.10	.23	.46	.648	−.13	.22	.60	.549	.06	.19	.30	.766
Promotion					−1.47	2.39	.62	.542
Promotion x Session					−.22	.17	1.35	.185
Promotion x Treatment					.79	2.96	.27	.789
Promotion x Session x Treatment					.47	.21	2.18	.034
Prevention									−1.22	1.85	.66	.512
Prevention x Session									−.12	.15	.77	.446
Prevention x Treatment									−.51	3.19	.16	.874
Prevention x Session x Treatment									.66	.28	2.38	.022
Random Effects	Variance Component	df	Chi square	p	Variance Component	df	Chi square	p	Variance Component	df	Chi square	p
Intercept (µ₀)	80.13	45	595.41	< .001	83.29	43	401.78	< .001	80.64	43	574.12	< .001
Linear Slope (µ₁)	.45	45	233.16	< .001	.46	43	280.04	< .001	.34	43	189.68	< .001
L1 Residual (r_ij)	20.51				20.52				20.45
Model Fit	Deviance	Parameters	AIC	BIC	Deviance	Parameters	AIC	BIC	Deviance	Parameters	AIC	BIC
	3671.89	4	3679.89	3697.39	3663.67	4	3671.08	3689.17	3657.81	4	3665.81	3683.31

Note. n = 49 participants (Level 2), 587 observed sessions (Level 1; 16 maximum per participant). Session is coded 0 (first week) to 15 in increments of 1. Condition is coded 0 = CBT, 1 = SST. Prevention and Promotion scores are standardized. AIC = Akaike Information Criterion; BIC = Bayesian Information Criterion.