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Moderators of Treatment Effects of a Video-Based Cognitive-Behavioral Therapy for Insomnia Comorbid With Cancer
Josée Savard1,2,3, Marie-Hélène Savard2,3, Hans Ivers1,2,3
1a School of Psychology, Université Laval , Québec , Canada.
Purpose:
To assess the moderating role of demographic and clinical variables on the efficacy of a video-based cognitive behavioral therapy for insomnia (VCBT-I) among breast cancer patients.
Patients And Methods:
As part of a randomized controlled trial, 80 women received VCBT-I.
Results:
Patients with a more advanced breast cancer were less likely to show reductions on the Insomnia Severity Index (ISI) and increased sleep efficiency at posttreatment. Patients using an antidepressant medication showed a larger reduction of ISI scores and a higher rate of insomnia remission. Remission of insomnia was also significantly more likely in individuals with a higher annual income. When using a multivariate binary classification tree analysis, the best and unique predictor of insomnia remission was having a less severe baseline ISI score.
Conclusion:
Although efficacious in general, VCBT-I does not appear to be an optimal format for everybody.
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