Stopped: End of research time, time-resources
The purpose of this study is to investigate the following two hypotheses: 1. Treatment with bright light improves their sleep, mood, concentration and self-sufficiency of elderly depressed subjects. This clinical improvement is accompanied by decreases in cortisol/DHEA ratio and increases in melatonin concentration in urine and saliva. 2. The eventual beneficial effect of bright light treatment can be predicted by the presence of sleep-wake rhythm disturbances as found using muscle activity registration, and by cortisol/DHEA and melatonin concentrations in saliva and urine over the day and the night.
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Hamilton Depression Rating Scale (HADRS-17)
Timeframe: at T0, T1 and T2