Insomnia may precede depression and even prolong it. people who suffer from lack of sleep are more likely to be suffering from mental disease than people who sleep soundly.
In the research reported at the 19th Annual Meeting of the Associated Professional Sleep Societies (APSS) in US, researchers of University of Rochester Sleep and Neurophysiology Research Laboratory have reported that insomnia can be linked to depression, or may start the depression as well.
Insomnia, for quite some time now, had been thought as one that is an effect or symptom of depression. However newer drugs to treat depression had been able to cure depression but not lack of sleep. This had led to newer studies, the result of one of which was presented at the meeting in US. The results of the study says that depressed people have 11 times more chance of staying depressed if they are not sleeping well than their counterparts who have no sleep problems.
Another sleep study suggests that as insomnia is common in the elderly population, the chances of them having depression is also as high as 6 times more than who have little or no sleep problems.
Reference: University of Rochester, news release, June 2005