chapter
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Life effects

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In comparison with narcolepsy, life effects of idiopathic hypersomnia, either with long sleep time or without, have been much less investigated, this being possibly due to less welldefined phenotypes and lower prevalence. The only available study to date is by Broughton et al.9 using the same questionnaire as used in a previous study in narcoleptic subjects.2

The subjects were 30 patients with idiopathic hypersomnia (without distinction at that time of the form with long sleep time and the form without long sleep time), 30 controls and 24 subjects with narcolepsy (22 with cataplexy and two without). Interpersonal relationships and marital problems have not been investigated.