Table 5.

Generalized Estimating Equation (GEE) Results for Relationship Outcomes During Follow-up

Female-reported Dyadic Adjustment Scale (DAS) (N = 59)
Predictor	d	95% CI	χ2	p
Treatment condition	.283	−.027, .593	3.204	.073
% days buprenorphine use	.076	−.051, .203	1.387	.239
Therapist A vs. Therapist B	.071	−.460, .602	0.068	.794
vs. Therapist C	−.221	−.637, .196	1.076	.299
vs. Therapist D	.169	−.398, .736	0.342	.559
vs. Therapist E	−.746	−1.686, .193	2.423	.120
Dual problem couple	−.110	−.451, .232	0.396	.529
Baseline female DAS	.587	.406, .769	40.145	<.001
Time	−.030	−.105, .045	0.605	.437
Treatment × time	.051	−.100, .203	0.443	.506
Treatment condition × dual problem couple	.096	−.628, .821	0.068	.794
Male-reported Dyadic Adjustment Scale (DAS) (N = 59)
Predictor	d	95% CI	χ2	p
Treatment condition	.569	.257, .880	12.800	<.001
% days buprenorphine use	.134	.004, .264	4.103	.043
Therapist A vs. Therapist B	−.026	−.563, .511	0.009	.925
vs. Therapist C	−.677	−1.083, −.271	10.673	.001
vs. Therapist D	−.609	−1.164, −.054	4.629	.031
vs. Therapist E	−.814	−1.682, .055	3.371	.066
Baseline male DAS	.444	.277, .612	27.021	<.001
Dual problem couple	−.293	−.653, .068	2.563	.111
Time	−.045	−.118, .028	1.443	.230
Treatment × time	.021	−.126, .167	0.076	.782
Treatment condition × dual problem couple	.142	−.551, .835	0.162	.688
Percentage Days Separated (PSEP) (N = 61)
Predictor	d	95% CI	χ2	p
Treatment condition	−.470	−.114, −.826	6.689	.010
% days buprenorphine use	−.040	−.154, .074	0.483	.487
Therapist A vs. Therapist B	−.050	−.614, .513	0.030	.861
vs. Therapist C	.481	−.075, 1.037	2.876	.090
vs. Therapist D	.140	−.437, .718	0.227	.634
vs. Therapist E	−.179	−.812, .454	0.308	.579
Baseline % days separated	.214	−.007, .435	3.615	.057
Dual problem couple	.194	−.241, .629	0.763	.382
Time	.070	.014, .125	6.058	.014
Treatment × time	−.066	−.176, .045	1.361	.243
Treatment condition × dual problem couple	−.402	−1.229, .425	0.907	.341

Note. Coding for treatment condition: 0 = individual-based treatment, 1 = behavioral couples therapy. Coding for dual problem couple: 0 = female but not male partner had substance use disorder, 1 = both partners had substance use disorder. Findings for main effects are displayed prior to entering interaction terms into the model. Cohen’s d effect sizes guidelines are small = 0.2, medium = 0.5, large = 0.8. To aid interpretation, the direction of the effects for PSEP is reversed, since PSEP is inversely transformed.