# A Trial of Negative Ion Generation Versus Light-Emitting Diode Phototherapy for Seasonal Affective Disorder (SAD)

> **NCT00809523** · PHASE2,PHASE3 · COMPLETED · sponsor: **Yale University** · enrollment: 106 (actual)

## Conditions studied

- Seasonal Affective Disorder

## Interventions

- **DEVICE:** Negative Ion Generator
- **DEVICE:** Light-emitting Photodiode light treatment device

## Key facts

- **NCT ID:** NCT00809523
- **Lead sponsor:** Yale University
- **Sponsor class:** OTHER
- **Phase:** PHASE2,PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2008-12
- **Primary completion:** 2010-04
- **Final completion:** 2010-04
- **Target enrollment:** 106 (ACTUAL)
- **Last updated:** 2013-03-06

## Collaborators

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00809523

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00809523, "A Trial of Negative Ion Generation Versus Light-Emitting Diode Phototherapy for Seasonal Affective Disorder (SAD)". Retrieved via AI Analytics 2026-06-09 from https://api.ai-analytics.org/clinical/NCT00809523. Licensed CC0.

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