title: The KickStrip: a novel testing device for periodic limb movement disorder.
abstract: OBJECTIVE
  In light of the ongoing debate over the clinical significance of periodic limb movement disorder (PLMD) and its monitoring in overnight sleep studies, we introduce a novel, portable, low-cost device for PLMD testing. The KickStrip is a disposable device, which includes a movement sensor, a central processing unit with real-time software, and a display. In the present study, the KickStrip final score (Kscore) is validated against the traditional periodic limb movement index (PLMI) based on overnight recordings in the sleep laboratory. DEISGN: Patients underwent full polysomnographic recordings concomitantly with the use of the KickStrip for a single night.
  
  
  METHODS
  Sleep Disorders Unit at Loewenstein Rehabilitation Hospital and Sleep Medicine Center at Rambam Medical Center, Israel.
  
  
  METHODS
  Eighty-two patients referred for overnight sleep recordings due to sleep disturbance of any kind.
  
  
  METHODS
  N/A.
  
  
  RESULTS
  The Kscores were collected and the PLMI computed for each leg separately. Pearson correlations between Kscores and PLMI ranged between r = 0.83 to r = 0.88 (p < 0.001). Sensitivity and specificity values of the Kscores for increasing PLMD thresholds showed sensitivity ranging from 50% to 100% and specificity ranging from 83% to 100%. Receiver operating characteristic curves showed area-under-the-curve values ranging from 82% to 92%. Bland-Altman plot showed high agreement between the methods.
  
  
  CONCLUSIONS
  Comparisons between the Kscores and the traditional PLMI show increased accuracy with severity level and excellent agreement. The KickStrip is a valuable tool for PLMD testing for both clinical and research purposes.
authors.affiliation: Scientific Laboratory Products, Ltd., Tel Aviv, Israel.
authors.forename: Tamar
authors.initials: T
authors.lastname: Shochat
authors.forename: Arie
authors.initials: A
authors.lastname: Oksenberg
authors.forename: Noam
authors.initials: N
authors.lastname: Hadas
authors.forename: Alex
authors.initials: A
authors.lastname: Molotsky
authors.forename: Peretz
authors.initials: P
authors.lastname: Lavie
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004576:Electromyography / Q000295:instrumentation; D004582:Electronics, Medical / Q000295:instrumentation*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000503:physiopathology; D020189:Nocturnal Myoclonus Syndrome / Q000175:diagnosis*; D017286:Polysomnography / Q000295:instrumentation; D012720:Severity of Illness Index