Brief Summary

Objective: To design, develop, and evaluate a personalized intervention for the universal prevention of depression and anxiety in the general population based on risk algorithms, ICTs, and decision support systems (DSS). Methods: A double-blind, parallel-group, randomized controlled trial with a twelve-month follow-up. The entire process of recruitment, random allocation, intervention, and follow-up will be conducted through the 'PredictPlusPrevent' platform and its associated apps. Following a media campaign, at least 9,000 Spanish participants aged 18 to 55 years without depression and/or anxiety at baseline will be randomly assigned to the intervention or active control group "PredictPlusPrevent". The "PredictPlusPrevent" intervention will be self-guided and implemented through participants' smartphones via an app; it will have a biopsychosocial and multi-component approach (8 modules: physical exercise, improving sleep, expanding relationships, problem-solving, improving communication, assertiveness, decision-making, and managing thoughts). The "PredictPlusPrevent" intervention is based on validated risk algorithms for depression and anxiety and a DSS that will help participants develop their own personalized depression prevention plans, which they will implement themselves while the platform monitors and provides feedback. The active control "PredictPlusPrevent" will include information from the risk algorithms and 24 self-help booklets. The primary outcome will be the incidence of new cases of depression and/or anxiety assessed using the PRIME-MD questionnaire, and secondary outcomes will include reductions in depression (PHQ-9) and anxiety symptoms (GAD-7), probability of depression and anxiety risk (predictD and predictA algorithms), and physical and mental quality of life (SF-12).

Trial Health

65
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Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
9,000

participants targeted

Target at P75+ for not_applicable depression

Timeline
22mo left

Started Feb 2026

Status
not yet recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Progress11%
Feb 2026Mar 2028

First Submitted

Initial submission to the registry

March 25, 2024

Completed
14 days until next milestone

First Posted

Study publicly available on registry

April 8, 2024

Completed
1.9 years until next milestone

Study Start

First participant enrolled

February 15, 2026

Completed
2.1 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

March 7, 2028

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

March 7, 2028

Last Updated

September 19, 2025

Status Verified

September 1, 2025

Enrollment Period

2.1 years

First QC Date

March 25, 2024

Last Update Submit

September 15, 2025

Conditions

Keywords

DepressionAnxiety DisordersPreventionm-healthAppRandomized Controlled Trial

Outcome Measures

Primary Outcomes (1)

  • Incidence of depression and/or anxiety disorders.

    Incidence of depression and/or anxiety disorders by Primary Care Evaluation of Mental Disorders (PRIME-MD). PRIME-MD is a diagnostic tool to diagnose depression and anxiety disorders.

    12 months

Secondary Outcomes (5)

  • Depressive symptoms measured by the Patient Health Questionnaire-9 (PHQ-9).

    12 months

  • Anxious symptoms measured by the General Anxiety Questionnaire (GAD-7).

    12 months

  • Probability of depression measured by the Spanish predictD risk algorithm.

    12 months

  • Probability of anxiety measured by the Spanish predictA risk algorithm.

    12 months

  • Quality of life measured by the 12-item Short Form (SF-12).

    12 months

Study Arms (2)

Predictplusprevent intervention

EXPERIMENTAL

The intervention will provide information about the likelihood of experiencing depression and anxiety. Additionally, it will offer a personalized depression prevention plan (PPP) based on various interventions such as physical exercise, sleep, expanding relationships, problem-solving, improving communication, assertiveness, decision-making, and managing thoughts.

Behavioral: Predictplusprevent intervention

Active control group

ACTIVE COMPARATOR

The intervention in the active control group will involve assessing the risk level of experiencing depression and/or anxiety in the next 12 months every 3 months. Additionally, participants assigned to this intervention will have free access to the 24 self-help booklets for preventing depression and anxiety included in the 'predictplusprevent' web platform. However, this group will not receive personalized prevention plans, decision support systems, or monitoring and feedback. They will also not have access to the 8 self-guided and interactive modules used in the intervention group.

Other: Psychoeducational intervention

Interventions

The intervention is based on validated risk algorithms to predict depression and anxiety and includes: 1) Mobile applications as main user's interface; 2) a DSS that helps participants to develop their own personalized plans to prevent (PPP) depression and/or anxiety; 3) eight intervention modules (the core of the system) including activities to prevent depression and anxiety, to be proposed and monitoring by the DSS. The intervention is biopsychosocial and multi-component, including the following modules: physical exercise, improving sleep, expanding relationships, problem solving, improving communication skills, assertiveness training, making decisions and managing thoughts. Participants will implement the recommendations and the tool will monitor these actions, offering feedback to improve their PPP at 3, 6, 9 and 12 months.

Predictplusprevent intervention

To know the level of risk of experiencing depression and/or anxiety in the next 12 months. In addition, participants assigned to this intervention will have free access to the 24 self-help pamphlets for preventing depression and anxiety.

Active control group

Eligibility Criteria

Age18 Years - 55 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Age between 18 and 55 years.
  • Participants must have a smartphone for their own use in the next year.

You may not qualify if:

  • Not signing the informed consent.
  • Having depression and/or anxiety at baseline according to the PRIME-MD questionnaire.
  • Living outside of Spain.
  • Having a severe mental disorder (psychosis, bipolar disorder, addictions, etc.), a terminal illness or cognitive impairment (dementia).
  • Difficulties in understanding Spanish.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

MeSH Terms

Conditions

DepressionAnxiety DisordersAlzheimer Disease

Condition Hierarchy (Ancestors)

Behavioral SymptomsBehaviorMental DisordersDementiaBrain DiseasesCentral Nervous System DiseasesNervous System DiseasesTauopathiesNeurodegenerative DiseasesNeurocognitive Disorders

Central Study Contacts

Juan Á. Bellón, PhD

CONTACT

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
TRIPLE
Who Masked
PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Principal Investigator

Study Record Dates

First Submitted

March 25, 2024

First Posted

April 8, 2024

Study Start

February 15, 2026

Primary Completion (Estimated)

March 7, 2028

Study Completion (Estimated)

March 7, 2028

Last Updated

September 19, 2025

Record last verified: 2025-09