Test-retest repeatability for Fatigue Assessment Scale, Short-Form 6-Dimension and King’s Sarcoidosis Questionnaire in people with sarcoidosis associated fatigue.

Test-retest repeatability for Fatigue Assessment Scale, Short-Form 6-Dimension and King’s Sarcoidosis Questionnaire in people with sarcoidosis associated fatigue.

Authors

  • Rebecca Ferris Department of Respiratory Medicine, Norfolk and Norwich University Hospital NHS Foundation Trust, Colney Lane, Norwich, Norfolk, NR4 7UY
  • Tun Maung Department of Respiratory Medicine, Norfolk and Norwich University Hospital NHS Foundation Trust, Colney Lane, Norwich, Norfolk, NR4 7UY
  • Christopher Atkins Department of Respiratory Medicine, Norfolk and Norwich University Hospital NHS Foundation Trust, Colney Lane, Norwich, Norfolk, NR4 7UY
  • Dayle Terrington Department of Respiratory Medicine, Norfolk and Norwich University Hospital NHS Foundation Trust, Colney Lane, Norwich, Norfolk, NR4 7UY
  • Allan Clark Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, Norfolk, UK, NR4 7TJ
  • Prasad Manivarmane Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, Norfolk, UK, NR4 7TJ
  • Andrew Wilson Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich, Norfolk, UK, NR4 7TJ

Keywords:

Sarcoidosis, Fatigue Assessment Scale, Short Form 6-Dimension

Abstract

Background and aim: Patient related outcomes are important in sarcoidosis but the medium-term repeatability of the key patient reported outcome measure is not known. We aimed to test the repeatability of the Fatigue Assessment Scale (FAS), Short Form 6-Dimension (SF-6D), and King’s Sarcoidosis Questionnaire (KSQ) in free living people with sarcoidosis associated fatigue. Methods: Twelve people with sarcoidosis associated fatigue completed the FAS, short form 36 questionnaire (SF-36) and the KSQ at baseline and 12 weeks. The SF-6D utility was calculated from the SF-36. The difference between baseline and 12 week assessments was measured. Results: The interclass correlation (95% confidence interval) showed good agreement between the baseline and 3 months measurements: FAS 0.91 (0.74, 0.71), SF-36 0.98 (0.94, 1), KSQ 0.98 (0.93, 0.99), SF-6D utility 0.98 (0.93, 0.99). The baseline (standard deviation) FAS was 27.83 (5.86) and at 12 weeks was 27.25 (7.55) representing 0.58 difference (95% CI for difference (-1.89, 3.06)), SF-6D utility was 0.69 (0.16) at baseline and 0.68 (0.17) after 3 months representing at 0.00 (-0.03, 0.03) difference and corresponding values for KSQ were 59.12 (18.68) and 56.91 (27.26) with a difference of -1.87 (5.49,1.76). Conclusions: There was good repeatability of FAS, SF-36, SF-6D and KSQ in free living people with sarcoidosis associated fatigue. Fatigue, general and disease specific health related quality of life showed no significant change over a 12 week period. Studies identifying changes in these outcomes can confidently report a true change and not measurement error or regression to the mean.

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Published

13-09-2023

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Section

Original Articles: Clinical Research

How to Cite

1.
Ferris R, Maung T, Atkins C, Terrington D, Clark A, Manivarmane SP, et al. Test-retest repeatability for Fatigue Assessment Scale, Short-Form 6-Dimension and King’s Sarcoidosis Questionnaire in people with sarcoidosis associated fatigue. Sarcoidosis Vasc Diffuse Lung Dis [Internet]. 2023 Sep. 13 [cited 2025 Apr. 3];40(3):e2023041. Available from: https://mattioli1885journals.com/index.php/sarcoidosis/article/view/13253