- Design
- Nationwide, non-blinded randomised controlled trial
- Population
- 350 pregnant women in Japan, unselected for depression
- Primary outcome
- Change in PHQ-9 from baseline to 8 weeks
- Effect
- No difference in pregnancy (SMD 0.11); lower postpartum scores (SMD 0.28)
This Japanese trial, published 24 September, randomised 350 pregnant women, with no minimum depression score required, to a fully self-guided smartphone app based on interpersonal psychotherapy or to usual care. It was not blinded.
The app was well accepted: 90.2% of users rated satisfaction above the threshold. There was no significant difference in depressive symptoms during pregnancy at eight weeks (SMD 0.11). At one month postpartum, the app group had lower depressive symptom scores (SMD 0.28).
A self-guided app is not treatment for established perinatal depression, and the postpartum benefit is small. But as a low-cost preventive layer for women who will not reach in-person therapy, it is a reasonable addition to routine antenatal care.
- A self-guided interpersonal therapy app did not change depressive symptoms during pregnancy.
- It was associated with slightly lower depression scores one month after birth.
- Treat such apps as prevention for unselected women, not treatment for diagnosed depression.
- Keep screening postpartum women with a validated tool such as the PHQ-9 or EPDS regardless of app use.
Why it matters
Suggests scalable digital support may matter most in the weeks after birth, when services thin out.
Don't overread it
Unblinded, self-reported, and the postpartum difference was not the eight-week primary outcome.
The statistics, in plain English
An SMD of 0.28 is a small effect. Because women knew which group they were in and self-reported symptoms, some of the difference may reflect expectation.
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