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

From: Correlating cognition and cortical excitability with pain in fibromyalgia: a case control study

Characteristics Fibromyalgia
(n = 34)
Pain-free Controls
(n = 30)
p-value
MMSE scores 22.5 (15.0, 29.0) 23.0 (19.0, 28.0) 0.054*
Stroop Task
 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*
  1. Data were analysed using Mann-Whitney U-rank test. Asterisk(*) shows significance at 5%. Values represented as median (q1 - q3). MMSE Total scores of Mini-mental examination scale; RMT Resting motor threshold, MSO Maximum stimulator output, MEP Motor evoked potential, PSQI Total scores of Pittsburgh sleep quality index, ESS Epworth sleepiness scale