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Table 3 Pearson correlations between measures assessed in the sample

From: Reduced heart rate variability predicts fatigue severity in individuals with chronic fatigue syndrome/myalgic encephalomyelitis

MeasuresNCQFIS-40HADSCOMPASS-31
PSQI.824**.813**.729**.816**
NCQ .942**.796**.852**
FIS-40  .843**.839**
HADS   .796**
  1. Significance: **p < 0.001