Increased nocturnal periodic limb movements in rheumatoid arthritis patients meeting questionnaire diagnostic criteria for restless legs syndrome

BMC Musculoskeletal Disorders

Bindu V Nair²  John A Gjevre¹  Regina M Taylor-Gjevre² 

[1] Division of Respiratory, Critical Care and Sleep Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 0W8;Division of Rheumatology, Department of Medicine, Royal University Hospital, University of Saskatchewan, Saskatoon, SK, Canada S7N 0W8

关键词: Periodic limb movements;    Rheumatoid arthritis;    Sleep;    Restless legs syndrome;   

Others  :  1091959
DOI  :  10.1186/1471-2474-15-378

 received in 2014-05-28, accepted in 2014-11-11,  发布年份 2014

【 摘 要 】

Background

Based on questionnaire criteria, the sensorimotor disorder restless legs syndrome (RLS) has been reported to have a higher prevalence in rheumatoid arthritis (RA) patients than in the general population. There has been some speculation that peripheral arthritic symptoms may allow false positive responses to questionnaire criteria. This study evaluates whether RA patients meeting RLS questionnaire criteria also have objective evidence of increased periodic limb movements (PLMs) characteristic of RLS.

Methods

Participants were recruited from RA clinic. Questionnaire data collected at study entry included: pain scores, rheumatoid arthritis disease activity index, Epworth sleepiness scale, Pittsburgh sleep quality index and RLS diagnostic criteria. Each participant was provided a PAM-RL actigraphic monitor, which attached to the ankle. This device was worn for two consecutive nights then returned for data download. Laboratory data including hemoglobin, iron studies, renal function and C-reactive protein levels were collected.

Results

Of the 57 participants, 23 met RLS diagnostic criteria. Those who met RLS criteria demonstrated higher mean frequency of nocturnal PLMs (19.63/hour; SD:21.13) than those who did not meet RLS criteria (11.13/hour; SD:12.10; p = 0.033). There were no significant differences between groups in terms of patient characteristics, disease activity or duration measures. Patients meeting RLS criteria did have poorer sleep quality measures (p <0.001).

Conclusions

RA patients who met RLS diagnostic criteria demonstrated higher frequencies of nocturnal PLMs than RA patients who did not meet criteria for RLS. This finding supports use of the RLS diagnostic criteria in helping to differentiate between RA arthritic symptoms and RLS.

【 授权许可】

   
2014 Taylor-Gjevre et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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