Table 2 Parameters of cognition, corticomotor excitability, and sleep parameters compared between participants with fibromyalgia and controls

MMSE scores

22.5 (15.0, 29.0)

23.0 (19.0, 28.0)

0.054*

 Color- reaction time (s)

2.9 (1.9, 4.5)

1.4 (0.6, 2.7)

<  0.001*

 Word- reaction time (s)

2.9 (2.0, 4.0)

1.6 (0.9, 2.5)

< 0.001*

 Color- correct response (%)

60.5 (41.0, 67.0)

63.0 (51.0, 76.0)

0.023*

 Word- correct response (%)

55.0 (41.0, 63.0)

59.0 (48.0, 71.0)

0.001*

RMT (% MSO)

52.0 (38.0, 70.0)

55.0 (35.0, 65.0)

0.121

MEP amplitude (uV)

67.0 (55.0, 87.0)

72.7 (56.7, 98.0)

0.111

PSQI scores

12.0 (6.0, 20.0)

3.0 (2.0, 5.0)

<  0.001*

 Subjective sleep quality

2.0 (1.0, 3.0)

1.0 (1.0, 2.0)

<  0.001*

 Sleep latency

2.0 (1.0, 3.0)

0.0 (0.0, 1.0)

<  0.001*

 Sleep duration

2.0 (1.0, 3.0)

1.0 (0.0, 1.0)

<  0.001*

 Habitual sleep efficiency

1.0 (0.0, 3.0)

0.0 (0.0, 1.0)

<  0.001*

 Sleep disturbances

2.0 (1.0, 3.0)

1.0 (0.0, 1.0)

<  0.001*

 Use of sleep medications

0.0 (0.0, 2.0)

0.0 (0.0, 0.0)

0.116

 Daytime sleepiness

2.0 (1.0, 3.0)

1.0 (0.0, 1.0)

<  0.001*

ESS scores

7.5 (2.0, 15.0)

3.0 (1.0, 5.0)

<  0.001*