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Lack of sleep; the property of being sleepless; the inability to sleep, insomnia.

Depiction of insomnia from the 14th century medical manuscript Tacuinum Sanitatis

Lack of sleep; the property of being sleepless; the inability to sleep, insomnia.

Potential complications of insomnia

Lack of sleep; the property of being sleepless; the inability to sleep, insomnia.

Disability-adjusted life year for insomnia per 100,000 inhabitants in 2004:   no data   less than 25   25–30.25   30.25–36   36–41.5   41.5–47   47–52.5   52.5–58   58–63.5   63.5–69   69–74.5   74.5–80   more than 80