Key Takeaway
Light therapy is effective for non-seasonal major depression, with combination of light plus fluoxetine showing superior results to medication alone.
Summary
This rigorous RCT tested whether light therapy works for non-seasonal major depressive disorder.
Study design:
- 122 patients with non-seasonal MDD
- 8-week randomized controlled trial
- Four groups: light + fluoxetine, light + placebo, sham + fluoxetine, sham + placebo
- 10,000 lux fluorescent light box, 30 min/day upon waking
Key findings:
- Light therapy effective for non-seasonal depression
- Light + fluoxetine superior to fluoxetine alone
- Light monotherapy outperformed fluoxetine monotherapy
- Combination showed best results
Response rates:
- Light + fluoxetine: 75.9% response
- Light + placebo: 50.0% response
- Sham + fluoxetine: 33.3% response
- Sham + placebo: 18.2% response
Depression score changes:
- Combination group: Largest improvement
- Light alone: Significant improvement
- Drug alone: Moderate improvement
- Differences clinically meaningful
Implications:
- Light therapy not just for seasonal depression
- Can enhance antidepressant medication effects
- May be effective as standalone treatment
- Accessible adjunct to standard care
Clinical significance:
Expands the indication for light therapy beyond SAD, supporting its use as an evidence-based treatment for major depression generally.