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Table 1 Pearson's correlation coefficients between fatigue measures at baseline

From: A five-year prospective study of fatigue in primary Sjögren's syndrome

  FACIT-F FSS Vitality
Fatigue VAS -0.65 0.47 -0.57
FACIT-F   -0.67 0.75
FSS    -0.51
  1. N = 140 for FSS comparisons, otherwise 141. P < 0.001 for all comparisons. Vitality and FACIT-F are negative scales, giving lower values with increasing fatigue. VAS, visual analogue scale; FACIT-F, Functional Assessment of Chronic Illness Therapy - Fatigue; FSS, Fatigue Severity Scale; vitality, short form-36 vitality domain.