# The 28 Day Challenge

> **NCT03936946** · NA · WITHDRAWN · sponsor: **Stanford University**

## Conditions studied

- Depression
- Anxiety
- Stress
- Hope

## Interventions

- **BEHAVIORAL:** Audio Content 1
- **BEHAVIORAL:** Audio Content 2

## Key facts

- **NCT ID:** NCT03936946
- **Lead sponsor:** Stanford University
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2020-06-10
- **Primary completion:** 2020-07-10
- **Final completion:** 2020-10-10
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Resources not secured
- **Last updated:** 2021-05-26


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03936946

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03936946, "The 28 Day Challenge". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT03936946. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*