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Table 1 Characteristics of groups dependent on RLS criteria status*

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

Variable

RLS- (SD) [nā€‰=ā€‰34]

RLSā€‰+ā€‰(SD) [nā€‰=ā€‰23]

Significance

Age (years)

54.76 (15.90)

55.65 (13.59)

0.809

Gender [Males: Females]

6:28

3:20

0.468

BMI

27.67 (6.15)

31.25 (8.53)

0.094

VAS pain (cm)

3.34 (2.07)

3.87 (2.24)

0.334

RADAI

2.96 (2.00)

3.66 (2.21)

0.197

PSQI

5.97 (3.47)

9.59 (3.11)

<0.001

ESS

7.42 (4.70)

7.87 (4.02)

0.682

Hemoglobin [g/L]

132.50 (15.38)

136.33 (10.07)

0.418

Ferritin [Ī¼g/L]

109.42 (118.67)

103.21 (111.17)

0.818

Iron [Ī¼mol/L]

15.44 (7.75)

16.43 (6.62)

0.568

C-reactive protein [mg/L]

6.09 (6.72)

4.02 (6.17)

0.144

Parity in female participants

2.37 (2.42)

1.00 (1.22)

0.071

Duration of RA diagnosis (years)

10.91 (9.38)

14.83 (12.11)

0.225

  1. *Mean values provided for non-categorical data; RLS: restless legs syndrome; SD:standard deviation; BMI: body mass index (kilograms/metre2); VAS: visual analogue scale; cm: centimetres; RADAI: rheumatoid arthritis disease activity index; PSQI: Pittsburgh sleep quality index; ESS: Epworth Sleepiness Scale; g: grams; L: litre; Ī¼g: microgram; Ī¼mol: micromole; mg: milligram.