Types of Insomnia
Author: Audrey White
There are two types of insomnia:
* Acute insomnia, which lasts one to three weeks;
* Chronic insomnia, which occurs at least three nights a week for at least a month.
Prevalence
Statistics on the prevalence of insomnia vary from one source to another, because the “criteria for insomnia” as used in the surveys are not always the same. Some researchers are based on the duration of symptoms, others on their severity, and still others, their presence or not. The criterion most often used is the frequency of symptoms of insomnia.
The latest Health Survey Canadian Community, about 13% of Canadians aged 15 and over are the insomnie1. According to the same survey, 36.5% of insomniacs do not usually feel refreshed upon awakening, while only 9.2% of people who say not to insomnia are tired in the morning. The survey also reveals that those affected by insomnia sleep on average one hour less per night than people who do pas1.
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