. Author manuscript; available in PMC: 2018 Jul 1.

Published in final edited form as: Behav Ther. 2016 Aug 6;48(4):501–516. doi: 10.1016/j.beth.2016.07.004

Table 3.

Multilevel Models Comparing TPOCS-RS Subscale Scores Across Groups

	Coefficient	S.E.	ES 95% [CI]	Deviance	n Parameters in Model
Coping Cat Subscale
Base Quadratic Model				3479.81	11
Intercept (first session value), γ₀₀₀	3.60^***	0.28	N/A
Slope (change over time in weeks), γ₁₀₀	0.104^***	0.02	N/A
Slope (change over time in weeks squared), γ₂₀₀	−0.004^***	0.001	N/A
Models including group contrasts¹				3368.54	17
Intercept (first session value), γ₀₀₀	4.65^***	0.21	N/A
Slope (change over time in weeks), γ₁₀₀	0.20^***	0.03	N/A
Slope (change over time in weeks squared), γ₂₀₀	−0.01^***	0.002	N/A
Group Differences in Intercept
ICBT (1) vs. YAS-UC (0)	2.62^***	0.32	3.16 [2.77, 3.54]
YAS-ICBT (1) vs. YAS-UC (0)	2.54^***	0.36	3.06 [2.62, 3.49]
ICBT (1) vs. YAS-ICBT (0)	0.08	0.34	0.10 [0.00, 0.51]
Group Differences in Linear Slope, γ_110, γ₁₂₀
ICBT (1) vs. YAS-UC (0)	0.20^***	0.04	5.54 [4.43, 6.65]
YAS-ICBT (1) vs. YAS-UC (0)	0.02	0.04	0.55 [0.00, 1.66]
ICBT (1) vs. YAS-ICBT (0)	0.17^**	0.05	4.82 [5.54, 6.09]
Group Differences in Quadratic Slope, γ_210, γ₂₂₀
ICBT (1) vs. YAS-UC (0)	−0.01^***	0.002
YAS-ICBT (1) vs. YAS-UC (0)	−0.002	0.001
ICBT (1) vs. YAS-ICBT (0)	−0.01^*	0.002

Psychodynamic Subscale
Base Quadratic Model				1898.14	11
Intercept (first session value), γ₀₀	1.46^***	0.10	N/A
Slope (change over time in weeks), γ₁₀₀	0.006	0.01	N/A
Slope (change over time in weeks squared), γ₂₀₀	0.0003	0.0006	N/A
Models including group contrasts¹				1864.54	17
Intercept (first session value), γ₀₀	2.09^***	0.15	N/A
Slope (change over time in weeks), γ₁₀₀	−0.03	0.03	N/A
Slope (change over time in weeks squared), γ₂₀₀	0.002^*	0.001	N/A
Group Differences in Intercept
ICBT (1) vs. YAS-UC (0)	−0.94^***	0.18	1.54 [1.25, 1.84]
YAS-ICBT (1) vs. YAS-UC (0)	−0.87^***	0.22	1.41 [1.07, 1.80]
ICBT (1) vs. YAS-ICBT (0)	−0.08	0.19	0.13 [0.00, 0.45]
Group Differences in Linear Slope, γ_110, γ₁₂₀
ICBT (1) vs. YAS-UC (0)	0.03	0.03	1.13 [0.00, 2.27]
YAS-ICBT (1) vs. YAS-UC (0)	0.09^**	0.03	3.39 [2.27, 4.55]
ICBT (1) vs. YAS-ICBT (0)	−0.06	0.03	2.26 [1.14, 3.42]
Group Differences in Quadratic Slope, γ_210, γ₂₂₀
ICBT (1) vs. YAS-UC (0)	−0.001	0.001
YAS-ICBT (1) vs. YAS-UC (0)	−0.003^*	0.001
ICBT (1) vs. YAS-ICBT (0)	−0.002	0.001

Family Subscale
Unconditional Means Model				3809.29	4
Intercept (first session value), γ₀₀	2.79^***	0.17	N/A
Models including group contrasts¹				3764.19	6
Intercept (first session value), γ₀₀	2.01^***	0.14	N/A
Group Differences in Intercept
ICBT (1) vs. YAS-UC (0)	−1.96^***	0.22	1.03 [0.91, 1.14]
YAS-ICBT (1) vs. YAS-UC (0)	−1.58^***	0.24	0.83 [0.70, 0.95]
ICBT (1) vs. YAS-ICBT (0)	−0.38	0.22	0.20 [0.08, 0.31]

Client-centered Subscale
Unconditional Means Model				3038.57	4
Intercept (first session value), γ₀₀	4.16^***	0.13	N/A
Models including group contrasts¹				3028.64	6
Intercept (first session value), γ₀₀	4.65^***	0.19	N/A
Group Differences in Intercept
ICBT (1) vs. YAS-UC (0)	0.88^**	0.28	0.62 [0.43, 0.82]
YAS-ICBT (1) vs. YAS-UC (0)	0.18	0.30	0.13 [0.00, 0.34]
ICBT (1) vs. YAS-ICBT (0)	0.70^*	0.29	0.50 [0.29, 0.70]

Note. For parsimony, this table includes only parameters of central conceptual interest (e.g., intercepts are not reported for the models examining group differences, parameters are not reported for the control variables).

TPOCS-RS = The Therapy Process Observational Coding System for Child Psychotherapy – Revised Strategies scale; S.E. = Standard Error; ES = effect size (Cohen’s d); ICBT = individual cognitive-behavioral treatment delivered in Kendall et al. study; YAS-ICBT = ICBT delivered in YAS; YAS-UC = usual care delivered in YAS.

p < .05;

^**

p < .01;

^***

p < .001