Treating depression with a smartphone-delivered self-help cognitive behavioral therapy for insomnia: a parallel-group randomized controlled trial

Christian S. Chan*, Christy Y.F. Wong, Branda Y.M. Yu, Victoria K.Y. Hui, Fiona Y.Y. Ho, Pim Cuijpers

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

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Abstract

Background Despite its efficacy in treating comorbid insomnia and depression, cognitive behavioral therapy for insomnia (CBT-I) is limited in its accessibility and, in many countries, cultural compatibility. Smartphone-based treatment is a low-cost, convenient alternative modality. This study evaluated a self-help smartphone-based CBT-I in alleviating major depression and insomnia. Methods A parallel-group randomized, waitlist-controlled trial was conducted with 320 adults with major depression and insomnia. Participants were randomized to receive either a 6-week CBT-I via a smartphone application, proACT-S, or waitlist condition. The primary outcomes included depression severity, insomnia severity, and sleep quality. The secondary outcomes included anxiety severity, subjective health, and acceptability of treatment. Assessments were administered at baseline, post-intervention (week 6) follow-up, and week 12 follow-up. The waitlist group received treatment after the week 6 follow-up. Results Intention to treat analysis was conducted with multilevel modeling. In all but one model, the interaction between treatment condition and time at week 6 follow-up was significant. Compared with the waitlist group, the treatment group had lower levels of depression [Center for Epidemiologic Studies Depression Scale (CES-D): Cohen's d = 0.86, 95% CI (-10.11 to -5.37)], insomnia [Insomnia Severity Index (ISI): Cohen's d = 1.00, 95% CI (-5.93 to -3.53)], and anxiety [Hospital Anxiety and Depression Scale - Anxiety subscale (HADS-A): Cohen's d = 0.83, 95% CI (-3.75 to -1.96)]. They also had better sleep quality [Pittsburgh Sleep Quality Index (PSQI): Cohen's d = 0.91, 95% CI (-3.34 to -1.83)]. No differences across any measures were found at week 12, after the waitlist control group received the treatment. Conclusion proACT-S is an efficacious sleep-focused self-help treatment for major depression and insomnia. Trial registration ClinicalTrials.gov, NCT04228146. Retrospectively registered on 14 January 2020. https://clinicaltrials.gov/ct2/show/NCT04228146

Original languageEnglish
Pages (from-to)1799-1813
Number of pages15
JournalPsychological Medicine
Volume53
Issue number5
Early online date23 Aug 2021
DOIs
Publication statusPublished - Apr 2023

Bibliographical note

Publisher Copyright:
Copyright © The Author(s), 2021. Published by Cambridge University Press.

Keywords

  • Cognitive behavioral therapy for insomnia
  • insomnia
  • major depression
  • sleep disturbance
  • smartphone intervention

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