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Some Causes of Insomnia and Excessive Daytime Sleepiness

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Disorder	Insomnia	Excessive Daytime Sleepiness
Adjustment insomnia	√
Central sleep apnea syndrome	√	√
Circadian rhythm sleep disorders	√	√
Drug-dependent and drug-induced sleep disorders	√	√
Inadequate sleep hygiene	√	√
Insufficient sleep syndrome		√
Narcolepsy		√
Obstructive sleep apnea	√	√
Periodic limb movement disorder	√	√
Physical sleep disorders or mental sleep disorders	√	√
Psychophysiologic insomnia	√
Restless legs syndrome	√
√ = commonly present (but insomnia and/or excessive daytime sleepiness can occur in any of these disorders).