Associations between personality disorder characteristics and treatment outcomes in people with co-occurring alcohol misuse and depression

Table 5 Predictors of change in depression from baseline: 6- and 12-month outcomes (N = 236 and 219)

		Outcome: Change in Depression (BDI-II) at 6-months				Outcome: Change in Depression (BDI-II) at 12-months
	Predictor	Simple correlation	∆R²	Standardized regression weight	Sig.	Simple correlation	∆R²	Standardized regression weight	Sig.
Step 1			.245				.302
	Age	.052		.026	.677	.030		.011	.868
	Gender (M = 1, F = 2)	-.062		.021	.730	-.100		-.009	.888
	Baseline alcohol use (OTI)	.165		.117	.048*	.127		.096	.106
	Baseline depression (BDI-II)	-.397		-.454	< .001	-.415		-.451	< .001
	Baseline functioning (GAF)	.007		-.086	.174	.014		-.068	.292
	Baseline IPDEQ:
	Cluster A	.077		.060	.377	.101		.110	.108
	Cluster B	.011		.018	.798	-.022		-.032	.653
	Cluster C	.144		.194	.003	.148		.187	.005
	Overall score^a	.102		.215	.001	.095		.216	0.001
	Treatment condition (TC) contrasts:
	TC1: Brief vs. 10 sessions	.127		.090	.135	.248		.216	< .001
	TC2: Integrated- vs. single-focused	-.016		.002	.972	-.061		-.012	.840
	TC3: Alcohol- vs. depression-focused	-.045		-.040	.504	-.096		-.089	.134
Step 2			.036				.059
	Interactions between cluster scores and TC contrasts (m = 9)
	Cluster A x TC1					-.100		-.160	.015*
	Cluster A x TC2					-.143		-.166	.019*
	Interactions between IPDEQ overall score and TC contrasts (m = 3)^a
	Overall score x TC2					-.107		-.138	.022*
			(R² = 0.280)				(R² = 0.360)

Note: IPDEQ, International Personality Disorder Examination Questionnaire. Change scores = follow-up phase minus baseline; *Trend (p < .05). ^aFrom a separate hierarchical regression including IPDEQ overall score (Step 1) and associated interactions (Step 2); only significant or trend level interactions are reported (m = number of interactions examined)

ISSN: 1471-244X