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

Table 4 Predictors of change in alcohol use from baseline: 6- and 12-month outcomes (N = 237 and 222)

		Outcome: Change in Alcohol use (OTI) at 6-months				Outcome: Change in Alcohol use (OTI) at 12-months
	Predictor	Simple correlation	∆R²	Standardized regression weight	Sig.	Simple correlation	∆R²	Standardized regression weight	Sig.
Step 1			.655				.652
	Age	-.051		.025	.552	.019		.082	.066
	Gender (M = 1, F = 2)	-.063		-.053	.190	-.160		-.104	.015*
	Baseline alcohol use (OTI)	-.783		-.790	< .001	-.781		-.789	< .001
	Baseline depression (BDI-II)	.072		-.043	.314	.055		-.045	.308
	Baseline functioning (GAF)	-.130		-.094	.027*	-.096		-.084	.060
	Baseline IPDEQ:
	Cluster A	-.013		-.033	.473	.003		.019	.696
	Cluster B	.046		.077	.104	.035		.069	.160
	Cluster C	.055		.056	.205	.041		.025	.603
	Overall score^a	.045		.077	.073	.039		.086	.055
	Treatment condition (TC) contrasts:
	TC1: Brief vs. 10 sessions	.091		.078	.054	.045		.012	.767
	TC2: Integrated- vs. single-focused	-.041		-.027	.501	-.046		-.056	.182
	TC3: Alcohol- vs. depression-focused	-.109		-.091	.023*	-.094		-.064	.126
Step 2			.007				.015
	Interactions between cluster scores and TC contrasts (m = 9)
	Interactions between IPDEQ overall score and TC contrasts (m = 3)^a
			(R² = 0.662)				(R² = 0.667)

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