Hornyak Magdolna, Riemann Dieter, Voderholzer Ulrich
Department of Psychiatry and Psychotherapy, University Hospital of Freiburg, Hauptstrasse 5, D-79104 Freiburg, Germany.
Sleep Med. 2004 Nov;5(6):597-600. doi: 10.1016/j.sleep.2004.07.008.
Periodic leg movements in sleep (PLMS) are a common finding in various sleep disorders. Whether PLMS are an epiphenomenon or are causally related to the presence of sleep-wake disturbances is still being debated. We investigated the relationship of the occurrence of PLMS to patients' perception of sleep quality during a night of polysomnography in various sleep disorders.
The retrospective evaluation included PLMS recordings over two nights of 78 consecutive patients diagnosed with a restless legs syndrome, primary insomnia or insomnia associated with a psychiatric disorder. The subjects' perception of sleep during the polysomnography night was assessed by the subscale 'sleep quality' of the validated self-rating sleep questionnaire SFA (SFA-SQ).
SFA-SQ scores correlated with the PLMS index (number of PLMS per hour of sleep) only in patients with restless legs syndrome during the first of the two nights investigated (r=-0.464, P<0.01). PLMS appear to have a low impact on the subjects' perception of sleep quality. The correlation of subjective sleep quality to PLMS index in the first of the two investigated nights in RLS patients may reflect an adaptation effect.
The results of our study favor the hypothesis that PLMS most likely are not the primary cause of sleep disturbances in these patient groups.
睡眠期周期性腿部运动（PLMS）在各种睡眠障碍中很常见。PLMS是一种附带现象还是与睡眠-觉醒障碍的存在存在因果关系仍在争论中。我们在多导睡眠图监测的一个晚上，研究了PLMS的发生与各种睡眠障碍患者睡眠质量感知之间的关系。
回顾性评估包括对78例连续诊断为不宁腿综合征、原发性失眠或与精神障碍相关失眠的患者进行两晚的PLMS记录。通过经过验证的自评睡眠问卷SFA（SFA-SQ）的“睡眠质量”子量表评估受试者在多导睡眠图监测当晚的睡眠感知。
仅在被调查的两晚中的第一晚，SFA-SQ评分与不宁腿综合征患者的PLMS指数（每小时睡眠中的PLMS数量）相关（r = -0.464，P < 0.01）。PLMS似乎对受试者的睡眠质量感知影响较小。在不宁腿综合征患者被调查的两晚中的第一晚，主观睡眠质量与PLMS指数的相关性可能反映了一种适应效应。
我们的研究结果支持以下假设，即PLMS很可能不是这些患者群体睡眠障碍的主要原因。
