There have been many research students looking at this question. Overall,based on the kind of questions you just looked at, we estimate that one in ten of the population has persistent and severe insomnia with daytime consequences , such as fatigue , mood alteration or poor concentration . This means that ten per cent of people have difficulty sleeping on three or more night a week, that this problem has gone on for at least three months, and it is causing them problems such as tiredness and moodiness . Of course, many more have less severe problems, and in adults over sixty five years, the number of people with persistent and severe insomnia could be as high as one in five.
Almost fifteen years ago, the largest ever survey was conducted of the mental health of the UK population.
From the studies and making graphs , both ment and women , sleep problems , tiredness and irritability are by far the most common symptoms of mental distress . Sleep problems are much more common than worry , depression amd anxiety.
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