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Randomized Controlled Trial
. 2018 Aug:107:34-41.
doi: 10.1016/j.brat.2018.05.010. Epub 2018 May 24.

Change in anxiety sensitivity and substance use coping motives as putative mediators of treatment efficacy among substance users

Kate Wolitzky-Taylor  1 , Tess K Drazdowski  2 , Andrea Niles  3 , Peter Roy-Byrne  4 , Richard Ries  4 , Richard Rawson  2 , Michelle G Craske  2
Affiliations
Randomized Controlled Trial

Change in anxiety sensitivity and substance use coping motives as putative mediators of treatment efficacy among substance users

Kate Wolitzky-Taylor et al. Behav Res Ther. 2018 Aug.

Abstract

Objective: Anxiety sensitivity and coping motives for substance use are processes implicated in anxiety and substance use disorder (SUD) comorbidity, and are malleable treatment targets. Little is known about whether changes in anxiety sensitivity or coping motives during cognitive behavioral therapy (CBT) for anxiety disorders (with or without CBT for SUD) mediate substance use outcomes among patients with comorbid anxiety disorders and SUD. We examined whether changes in anxiety sensitivity and coping motives during treatment for comorbid SUD and anxiety disorders (either CBT for SUD only or CBT for SUD and anxiety disorders) were associated with substance use outcomes.

Methods: Repeated measurements of anxiety sensitivity and coping motives throughout treatment were examined from a randomized clinical trial comparing usual, CBT-based treatment at a substance use disorder specialty clinic (UC) to that usual care plus a brief CBT for anxiety program for patients with comorbid anxiety and substance use disorders (CALM ARC).

Results: Anxiety sensitivity decline during treatment was significantly steeper among those who received CALM ARC than those in UC. Decreases in anxiety sensitivity mediated the effect of treatment group on alcohol use following treatment such that the greater reduction in anxiety sensitivity in CALM ARC explained the superior outcomes for alcohol use in CALM ARC compared to UC. Declines in substance use coping motives were not observed in either condition, and did not differ between CALM ARC and UC. Thus, declines in coping motives did not mediate substance use after treatment.

Conclusions: These findings provide preliminary evidence suggesting alcohol use outcomes were related to decreasing anxiety sensitivity rather than decreasing coping motives. Implications and future directions are discussed.

Trial registration: ClinicalTrials.gov NCT01764698.

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Figures

Fig. 1.
Fig. 1.
ASI decline slopes by condition.
Fig. 2.
Fig. 2.
Coping motives decline slopes by condition.
Fig. 3.
Fig. 3.
Mediation model with parameter estimates for number of drinking days outcome. Note. *p < .05, **p < .01, **p < .001.
See this image and copyright information in PMC

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