[Chronic renal failure (hemo-dialysis patients)]

The feature of a dialysis patient's sleep disorder is that deviation with a feeling of subjective sleep and an objective sleep disturbance is large, and subjective symptoms are scarce considering serious sleep disorders. The feature of a dialysis patient' s sleep disturbance is characterized by increase in time to awake on bed and the fragmentation of sleep, which lead to reduction in sleeping hours. The prevalence of SAS (sleep apnea syndrome) in the dialysis patient is several times higher compared with the commoner. The prevalence of RLS (restless legs syndrome) in Japanese dialysis patient was almost even with Westerners patient. Otherwise it tends to underestimate sleep disturbance, our questionary survey revealed high prevalence of subjective sleep complaints in dialysis patients. The realities of dialyzed patient' s sleep disturbance might be more serious than we think.