Does Internet-based cognitive behavioral therapy (iCBT) prevent major depressive episode for workers? A 12-month follow-up of a randomized controlled trial

Imamura, K.; Kawakami, N.; Furukawa, T. A.; Matsuyama, Y.; Shimazu, A.; Umanodan, R.; Kawakami, S.; Kasai, K.

doi:10.1017/s0033291714003006

Cited by 61Digital Mental Health InterventionsAnxiety, Depression, Psychometrics, Treatment, Cognitive ProcessesMental Health Treatment and Access

Does Internet-based cognitive behavioral therapy (iCBT) prevent major depressive episode for workers? A 12-month follow-up of a randomized controlled trial

Imamura, K., Kawakami, N., Furukawa, T. A., Matsuyama, Y., Shimazu, A., Umanodan, R., Kawakami, S., Kasai, K.·2015·Psychological Medicine

DOI 10.1017/s0033291714003006

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Abstract

BACKGROUND: In this study we investigated whether an Internet-based computerized cognitive behavioral therapy (iCBT) program can decrease the risk of DSM-IV-TR major depressive episodes (MDE) during a 12-month follow-up of a randomized controlled trial of Japanese workers. METHOD: Participants were recruited from one company and three departments of another company. Those participants who did not experience MDE in the past month were randomly allocated to intervention or control groups (n = 381 for each). A 6-week, six-lesson iCBT program was provided to the intervention group. While the control group only received the usual preventive mental health service for the first 6 months, the control group was given a chance to undertake the iCBT program after a 6-month follow-up. The primary outcome was a new onset of DSM-IV-TR MDE during the 12-month follow-up, as assessed by means of the web version of the WHO Composite International Diagnostic Interview (CIDI), version 3.0 depression section. RESULTS: The intervention group had a significantly lower incidence of MDE at the 12-month follow-up than the control group (Log-rank χ2 = 7.04, p < 0.01). The hazard ratio for the intervention group was 0.22 (95% confidence interval 0.06-0.75), when estimated by the Cox proportional hazard model. CONCLUSIONS: The present study demonstrates that an iCBT program is effective in preventing MDE in the working population. However, it should be noted that MDE was measured by self-report, while the CIDI can measure the episodes more strictly following DSM-IV criteria.

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Imamura et al.'s internet CBT may have been effective in preventing the occurrence of major depressive episode.
“However, the intervention may have been effective in preventing the occurrence of major depressive episode as there was a significantly lower incidence of such episodes reported for those in the intervention group versus the control group.”
From Web-based interventions for the management of stress in the workplace: Focus, form, and efficacy (2017) · cites this paper as [51]
There was a significantly lower incidence of major depressive episodes reported for those in the intervention group versus the control group in Imamura et al.'s internet CBT at 12-month follow-up.
“However, the intervention may have been effective in preventing the occurrence of major depressive episode as there was a significantly lower incidence of such episodes reported for those in the intervention group versus the control group.”
From Web-based interventions for the management of stress in the workplace: Focus, form, and efficacy (2017) · cites this paper as [51]
A 12-month follow-up of Imamura et al.'s internet CBT found that the effect on scores of depression or distress was not maintained to this time point.
“A 12-month follow-up51) found that the effect of the intervention on scores of depression or distress was no maintained to this time point.”
From Web-based interventions for the management of stress in the workplace: Focus, form, and efficacy (2017) · cites this paper as [51]

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Effects of an internet-based cognitive behavioural therapy intervention on preventing major depressive episodes among workers: a protocol for a randomised controlled trial
Imamura, K., Norito, K., Furukawa, T. A., Matsuyama, Y., Shimazu, A., & Kasai, K. (2015) · BMJ Open · doi:10.1136/bmjopen-2015-007590 · Cited by 6 · see citing works
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Effects of an internet-based cognitive behavioral therapy (iCBT) program in Manga format on improving subthreshold depressive symptoms among healthy workers : a randomized controlled trial
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Self-citation
Correspondence to
Kawakami, N., & Ta, F. (2015)
Effects of an internet-based cognitive behavioral therapy (iCBT) intervention for improving depression among workers : a randomized controlled trial
今村, 幸. (2013)
Internet‐based cognitive behavior therapy for major depressive disorder: A randomized controlled trial
Rosso, I. M., Killgore, W. D. S., Olson, E. A., Webb, C. A., Fukunaga, R., Auerbach, R. P., Gogel, H., Buchholz, J. L., & Rauch, S. L. (2016) · Depression and Anxiety · doi:10.1002/da.22590 · Cited by 65 · see citing works

Authors: Imamura, K., Kawakami, N., Furukawa, T. A., Matsuyama, Y., Shimazu, A., Umanodan, R., Kawakami, S., & Kasai, K.
Affiliations: The University of Tokyo (JP)
Kyoto University (JP)
Museum of Kyoto (JP)
Nihon University (JP)
Corresponding author: Kawakami, N.
ORCID: Imamura, K.
Kawakami, N.
Furukawa, T. A.
Matsuyama, Y.
Shimazu, A.
Kasai, K.
Venue: Psychological Medicine
Publisher: Cambridge University Press (CUP)
Published: 2015-01-07
Volume: 45
Issue: 9
Pages: 1907-1917
ISSN: 0033-2917 (ISSN-L)
1469-8978
DOI: 10.1017/s0033291714003006
OpenAlex: W2141054249
Cited by: 61
References: 32
Citations by year: 2025: 5 · 2024: 7 · 2023: 4 · 2022: 8 · 2021: 2 · 2020: 4 · 2019: 4 · 2018: 8 · 2017: 8 · 2016: 9 · 2015: 2
FWCI: 14.59
Type: journal article
Language: en
Open access: closed
Licence: www.cambridge.org/core/terms (unspecified)
Locations: Psychological Medicine (publishedVersion)
PubMed (publishedVersion)
VU Research Portal (publishedVersion)
Data Archiving and Networked Services (DANS) (submittedVersion)
Funders: Japan Society for the Promotion of Science (26860433)
Topics: Social Sciences › Psychology › Applied Psychology › Digital Mental Health Interventions
Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
Social Sciences › Psychology › Social Psychology › Mental Health Treatment and Access
Keywords: internet-based cognitive behavioral therapy, major depressive episode, depression prevention, workplace mental health, workers, Japanese workers, DSM-IV-TR diagnostic criteria
MeSH terms: Adult, Depression, Depressive Disorder, Major, Major Depressive Disorder, Depressive Disorder, Female, Follow-Up Studies, Humans, Japan, Male, Middle Aged, Therapy, Computer-Assisted, Cognitive Behavioral Therapy, Occupational Health, Internet

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Does Internet-based cognitive behavioral therapy (iCBT) prevent major depressive episode for workers? A 12-month follow-up of a randomized controlled trial

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