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Table 2 Periodic limb movements and sleep duration measures

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

Measure RLS- (SD) [n = 34] RLS + (SD) [n = 23] Significance
PLMs/hour Night 1 10.62 (12.35) 20.04 (21.76) 0.015
PLMs/hour Night 2 11.59 (13.05) 19.22 (23.40) 0.088
Average PLMs/hour 11.13 (12.10) 19.63 (22.13) 0.033
Duration of sleep (hours) Night 1 07:47 (01:29) 08:04 (01:12) 0.459
Duration of sleep (hours) Night 2 07:46 (01:32) 07:44 (00:51) 0.588
Average sleep duration (hours) 07:47 (01:27) 07:54 (00:56) 0.890
  1. Mean values provided for non-categorical data; RLS: restless legs syndrome; SD: standard deviation; PLMs: periodic limb movements.