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Deprexis online therapy reduced depression scores

An integrative online program (Deprexis) improved BDI depression symptoms versus delayed treatment in a large German internet RCT.

Source

Effectiveness of a novel integrative online treatment for depression (Deprexis): randomized controlled trial

Meyer B, Berger T, Caspar F, et al. · Journal of medical Internet research · 2009

doi.org/10.2196/jmir.1151Read the full paper ↗240 citationscc by

What they did

Researchers randomized 396 adults recruited online to immediate Deprexis treatment or delayed treatment and compared BDI and functioning over time.

What they found

Immediate treatment improved ~5.4 BDI points (d=0.58) with a significant condition×time interaction; delayed group showed essentially no BDI change over the same interval.

The limits

What it doesn't show

How Deprexis compares head-to-head with face-to-face CBT, or effects in people without internet access/forum recruitment.

Key terms

Deprexis
Integrative online depression treatment program tested in the trial.
BDI
Beck Depression Inventory symptom severity scale.
Effect size d
Standardized mean change (Cohen’s d) describing treatment magnitude.
Immediate vs delayed treatment
Random assignment to start now versus wait-list style delay.
ITT analysis
Intention-to-treat approach including participants with missing data strategies.
Online CBT-style care
Internet-delivered structured psychological treatment for depression.

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Immediate BDI improvement was about:

Common questions

How large was the sample?

396 individuals; 81% immediate, 19% delayed.

How much did BDI fall with immediate treatment?

About 5.4 points (26.72→21.30), d=0.58.

Did the delayed group improve over the same window?

No meaningful BDI change (d≈0.01).

Was the time×treatment interaction significant?

Yes (e.g., F=19.2, P<.001 for BDI).

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