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Scand J Rheumatol. 2005 Nov-Dec;34(6):455-9.

Assessment of fatigue in primary Sjögren's syndrome: the Swedish version of the Profile of Fatigue.

Author information

1
Department of Rheumatology, Malmö University Hospital, Malmö, Sweden. britta.strombeck@skane.se

Abstract

OBJECTIVE:

To translate the disease-specific Profile of Fatigue (ProF) into Swedish and to evaluate the reliability and validity of the Swedish version.

METHODS:

Forward and back translations were performed. Seventy patients with primary Sjögren's syndrome (PSS), 48 control persons, and two rheumatologists participated. Test-retest reliability, internal consistency, content, construct and discriminant validity were investigated.

RESULTS:

The translation was accepted without modifications. The test-retest reliability varied between moderate and good (weighted Kappa = 0.51-0.63). Internal consistency was high (Cronbach's alpha = 0.97). Construct validity was proved by significant correlations of the questionnaire items with the Visual Analogue Scale (VAS) for fatigue (r(s) = 0.55-0.70), and the Physical Function (PF) (r(s) = -0.20 to -0.41) and Vitality (VT) scales (r(s) = -0.60 to -0.77) of the MOS 36-Item Short-Form Health Survey (SF-36). Content validity was mainly judged as good. A significant difference between the scorings of the patients and the scorings of the control group was seen (mean difference 1.6, p<0.005).

CONCLUSION:

The Swedish version of the ProF is a relatively reliable and valid instrument for the measurement of fatigue in patients with PSS.

PMID:
16393768
DOI:
10.1080/03009740510026571
[Indexed for MEDLINE]

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