| Methods |
Allocation: randomized, crossover.
Blinding: not stated.
Duration: 5 days. |
| Participants |
Diagnosis: moderate to severe depression based on pretest score (GDS).
Inclusion criteria: mentally autonomous state.
Exclusion criteria: primary degenerative dementia, multi‐infarct dementia, photosensitizing medications, use of antidepressants, retinal problems.
N = 11 (10 completers).
Age: mean 83.8 years.
Sex: F 7, M 4.
Setting: long‐term care facility. |
| Interventions |
1. Bright light (10,000 lux between 9 AM and 12:30 PM for 30 minutes). N = 4.
2. Dim light (300 lux between 9 AM and 12:30 PM for 30 minutes). N = 3.
3. No treatment. N = 4.
Device: light box. |
| Outcomes |
Unable to use ‐ Mental state (GDS ‐ no mean scores and SD of the first phase of the crossover design available).
Adverse effects (patient reports).
Authors contacted. |
| Notes |
Light only.
Only interventions 1. and 2. compared. |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Allocation concealment? |
Unclear risk |
B ‐ Unclear |
