Neuropsychological tests scores.

FM = Fibromyalgia, df = Degrees of freedom, DS F = Digit Span Forward, AVLT = Rey auditory-verbal learning test, AVLT D = Rey auditory-verbal learning test Delayed recall, TMT = Trail Making Test, FAS = verbal fluency, DS B = Digit Span Backward, ToL = Tower of London (total score—range 0–36—given by the sum of the time-based scores of the twelve configurations to solve; the higher the score the higher the performance), SD = Standard deviation. Mean (SD) or mean rank, t-test or Mann–Whitney U test are listed.