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

BMC Musculoskelet Disord · 2014 · PMC4247724 · PMID 25406507

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an observed trendno p-value reported

There was an observed trend between higher disease duration and activity and RLS.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.