3.3 million suffer insomnia.
There are no standard criteria for defining insomnia, although the most common definitions are based on frequency. For the CCHS, respondents were asked how often they had trouble going to sleep or staying asleep. Those who answered either "most of the time" or "all of the time" were considered to have insomnia. A link between obesity and insomnia was also found.
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|Date:||Nov 21, 2005|
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