Savard, J., Ivers, H., Savard, M.H., & Morin, C.M. (2015). Long-term effects of two formats of cognitive behavioral therapy for insomnia comorbid with breast cancer. Sleep, 39, 813–823.
To assess the long-term efficacy of a video-based behavioral therapy for insomnia (VCBT-I) as compared to a professionally administered intervention (PCBT-I) and to a no treatment group (CTL).
Participants were randomized to receive one of two types of CBT for insomnia or a control arm with no intervention. The PCBT-I arm received six weekly individual treatment sessions (50 minutes each) with a companion booklet at each session. This was administered by a psychologist or PhD student with CBT experience. The VCBT-I group received a 60-minute video, and they were instructed to watch 5–20 minutes each week and to read a companion booklet each week. They had telephone access to a licensed psychologist if they had questions. All received pre- and postintervention evaluations, as well as long-term follow-up evaluation at 3, 6, and 12 months.
Post-treatment to follow-up in PCBT-I arm showed significant increase in EMA and TST. The VCBT-I group showed a significant increase in WASA. The control arm showed a significant increase in all sleep variables. There was a reduction, albeit nonsignificant, in the use of hypnotics in the PCBT-I arm, a significant reduction in the VCBT-I arm, and an increase in the control arm. Insomnia remission rates were significantly higher for the PCBT-I group at three and six months when compared to the VCBT-I group. No difference existed at 12 months.
The PCBT-I and VCBT-I groups showed immediate and sustained improvement in several sleep outcomes at three- and six-month follow-ups. When compared, the face-to-face intervention was superior to the video-delivered intervention. The remission rate remained highest in the PCBT-I group. With that said, results should be interpreted with caution because of secondary to selection bias, attrition with significant differences in those who dropped out, and differences in study groups.
Further study is needed to document alternative ways to deliver CBT interventions for improving sleep outcomes. Personalized 1:1 CBT appears to be the most effective, although when resources are limited, a video-based intervention can be substituted and does show efficacy.