Abstract:
BACKGROUND:The status of night-to-night variability for periodic limb movements in sleep (PLMS) has not been clarified. With this in mind, we investigated the validity of PLMS measurement by actigraphy with the PAM-RL device in Japanese patients with suspected restless legs syndrome (RLS) or periodic limb movement disorder (PLMD) and the night-to-night variability of PLMS among the subjects. METHODS:Forty-one subjects (mean age, 52.1±16.1 years) underwent polysomnography (PSG) and PAM-RL measurement simultaneously. Thereafter, subjects used the PAM-RL at home on four more consecutive nights. RESULTS:The correlation between PLMS index on PSG (PLMSI-PSG) and PLM index on PAM-RL (PLMI-PAM) was 0.781 (P<.001). When the PLMSI cutoff value on PSG was set at 15 episodes per hour, the cutoff value for predicting this PLMSI level was 16.0 episodes per hour. When the condition was set to the level in which the mean interclass correlation coefficient reached ≥0.9, the number of required nights for repeated measurements was 26 nights for subjects with PLMI of <15 episodes per hour and three nights for those with PLMI ≥15 episodes per hour on PAM-RL. CONCLUSIONS:PAM-RL is thought to be valuable for assessing PLMS even in Japanese subjects. Recording of PAM-RL for three or more consecutive nights may be required to ensure the screening reliability of a patient with suspected pathologically frequent PLMS.
journal_name
Sleep Medjournal_title
Sleep medicineauthors
Kobayashi M,Namba K,Ito E,Nishida S,Nakamura M,Ueki Y,Furudate N,Kagimura T,Usui A,Inoue Ydoi
10.1016/j.sleep.2013.08.790subject
Has Abstractpub_date
2014-01-01 00:00:00pages
138-43issue
1eissn
1389-9457issn
1878-5506pii
S1389-9457(13)01182-9journal_volume
15pub_type
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