Table 1

Pearson's correlation coefficients between fatigue measures at baseline

FACIT-F

FSS

Vitality


Fatigue VAS

-0.65

0.47

-0.57

FACIT-F

-0.67

0.75

FSS

-0.51


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.

Haldorsen et al. Arthritis Research & Therapy 2011 13:R167   doi:10.1186/ar3487

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