Reliability and validity of Short Form 36 Version 2 to measure health perceptions in a sub-group of individuals with fatigue.
Disabil Rehabil. 2011;33(25-26):2596-604. doi: 10.3109/09638288.2011.582925. Epub 2011 Jun 20.
Davenport TE, Stevens SR, Baroni K, Van Ness JM, Snell CR.
Source
Department of Physical Therapy, Thomas J. Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, California, USA. tdavenport@pacific.edu
Abstract*
PURPOSE:
To determine the validity and reliability of Short Form 36 Version 2 (SF36v2) in sub-groups of individuals with fatigue.
METHOD:
Thirty subjects participated in this study, including n = 16 subjects who met case definition criteria for chronic fatigue syndrome (CFS) and n = 14 non-disabled sedentary matched control subjects.
SF36v2 and Multidimensional Fatigue Inventory (MFI-20) were administered before two maximal cardiopulmonary exercise tests (CPETs) administered 24 h apart and an open-ended recovery questionnaire was administered 7 days after CPET challenge.
The main outcome measures were self-reported time to recover to pre-challenge functional and symptom status, frequency of post-exertional symptoms and SF36v2 sub-scale scores.
RESULTS:
Individuals with CFS demonstrated significantly lower SF36v2 and MFI-20 sub-scale scores prior to CPET.
Between-group differences remained significant post-CPET, however, there were no significant group by test interaction effects.
Subjects with CFS reported significantly more total symptoms (p < 0.001), as well as reports of fatigue (p < 0.001), neuroendocrine (p < 0.001), immune (p < 0.01), pain (p < 0.01) and sleep disturbance (p < 0.01) symptoms than control subjects as a result of CPET.
Many symptom counts demonstrated significant relationships with SF36v2 sub-scale scores (p < 0.05). SF36v2 and MFI-20 sub-scale scores demonstrated significant correlations (p < 0.05).
Various SF36v2 sub-scale scores demonstrated significant predictive validity to identify subjects who recovered from CPET challenge within 1 day and 7 days (p < 0.05).
Potential floor effects were observed for both questionnaires for individuals with CFS.
CONCLUSION:
Various sub-scales of SF36v2 demonstrated adequate reliability and validity for clinical and research applications.
Adequacy of sensitivity to change of SF36v2 as a result of a fatiguing stressor should be the subject of additional study.
PMID: 21682669 [PubMed - indexed for MEDLINE]
*I've given each sentence its own paragraph