# Evaluating the Effectiveness and Acceptability of a GPT-4o and RAG-Based Voice Chatbot for Depression Screening Using PHQ-9

> **NCT06801925** · — · ENROLLING_BY_INVITATION · sponsor: **University College, London** · enrollment: 100 (estimated)

## Conditions studied

- Depression - Major Depressive Disorder
- Depression Anxiety Disorder

## Interventions

- **PROCEDURE:** GPT-4o and RAG Voice Chatbot for PHQ-9 Screening

## Key facts

- **NCT ID:** NCT06801925
- **Lead sponsor:** University College, London
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** ENROLLING_BY_INVITATION
- **Start date:** 2025-02-01
- **Primary completion:** 2025-03-31
- **Final completion:** 2025-05-31
- **Target enrollment:** 100 (ESTIMATED)
- **Last updated:** 2025-01-30


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT06801925

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT06801925, "Evaluating the Effectiveness and Acceptability of a GPT-4o and RAG-Based Voice Chatbot for Depression Screening Using PHQ-9". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT06801925. Licensed CC0.

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