Prevalence and associations of respiratory-related leg movements: the XXXX sleep study.

@entity1 @entity35638 @entity101 @entity27 @entity4531 @entity1030 @entity386
OBJECTIVES: Obstructive respiratory events often terminate with an associated respiratory-related leg movement (RRLM). Such leg movements are not scored as periodic leg movements (periodic limb movements during sleep, PLMS), although the criteria for distinguishing RRLM from PLMS differ between the American Academy of Sleep Medicine (AASM) and the World Association of Sleep Medicine (WASM)/ International @entity4531 Study Group (IRLSSG) scoring manuals. Such LMs may be clinically significant in @entity1 with @entity27 ( @entity27 ). The prevalence and correlation of RRLM in @entity1 with @entity27 were examined. METHODS: A case-control sample of 575 @entity1 was selected from all @entity1 with an @entity27 index (AHI, >= 3% desaturation criteria)   >=    10 and good data from piezoelectric leg movement sensors at the first in-home sleep study in the @entity35638 cohort (mean age   =   76.8 years). Sleep studies were rescored for RRLMs using five different RRLM definitions varying in both latency of leg movement onset from respiratory event termination and duration of the leg movement. The quartile of RRLM% (the number of RRLM/the number of hypopneas   +   @entity386 ) was derived. RESULTS: The nonparametric densities of RRLM% were most influenced by alterations in the latency rather than the duration of the LM. The most liberal RRLM definition (latency 0-5   s, duration 0.5-10   s) led to a median RRLM% of 23.4 (interquartile range 12.41, 37.12) in this sample. The average AHI and arousal index increased as the quartile of RRLM% increased, as well as the prevalence of @entity1030 ( @entity1030 ). The prevalence of those with a history of @entity101 decreased as RRLM% increased. The non-Caucasian race was associated with lower RRLM%. CONCLUSION: Within an elderly sample with moderate to severe @entity27 , piezoelectric-defined RRLM% is associated with a number of sleep-related and demographic factors. Further study of the optimal definition, predictors, and consequences of RRLM is warranted.
