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Journal Article
Research Support, Non-U.S. Gov't
Test-retest reliability and smallest detectable change of the Bristol Impact of Hypermobility (BIoH) questionnaire.
Musculoskeletal Science & Practice 2017 December
OBJECTIVE: The Bristol Impact of Hypermobility (BIoH) questionnaire is a patient-reported outcome measure developed in conjunction with adults with Joint Hypermobility Syndrome (JHS). It has demonstrated strong concurrent validity with the Short Form-36 (SF-36) physical component score but other psychometric properties have yet to be established. This study aimed to determine its test-retest reliability and smallest detectable change (SDC).
DESIGN: A test-retest reliability study.
SETTING: Participants were recruited from the Hypermobility Syndromes Association, a patient organisation in the United Kingdom.
PATIENTS: Recruitment packs were sent to 1080 adults who had given permission to be contacted about research.
MAIN OUTCOME MEASURES: BIoH and SF-36 questionnaires were administered at baseline and repeated two weeks later. An 11-point global rating of change scale (-5 to +5) was also administered at two weeks. Test-retest analysis and calculation of the SDC was conducted on 'stable' patients (defined as global rating of change -1 to +1).
RESULTS: 462 responses were received. 233 patients reported a 'stable' condition and were included in analysis (95% women; mean (SD) age 44.5 (13.9) years; BIoH score 223.6 (54.0)). The BIoH questionnaire demonstrated excellent test-retest reliability (ICC 0.923, 95% CI 0.900-0.940). The SDC was 42 points (equivalent to 19% of the mean baseline score). The SF-36 physical and mental component scores demonstrated poorer test-retest reliability and larger SDCs (as a proportion of the mean baseline scores).
CONCLUSION: The results provide further evidence of the potential of the BIoH questionnaire to underpin research and clinical practice for people with JHS.
DESIGN: A test-retest reliability study.
SETTING: Participants were recruited from the Hypermobility Syndromes Association, a patient organisation in the United Kingdom.
PATIENTS: Recruitment packs were sent to 1080 adults who had given permission to be contacted about research.
MAIN OUTCOME MEASURES: BIoH and SF-36 questionnaires were administered at baseline and repeated two weeks later. An 11-point global rating of change scale (-5 to +5) was also administered at two weeks. Test-retest analysis and calculation of the SDC was conducted on 'stable' patients (defined as global rating of change -1 to +1).
RESULTS: 462 responses were received. 233 patients reported a 'stable' condition and were included in analysis (95% women; mean (SD) age 44.5 (13.9) years; BIoH score 223.6 (54.0)). The BIoH questionnaire demonstrated excellent test-retest reliability (ICC 0.923, 95% CI 0.900-0.940). The SDC was 42 points (equivalent to 19% of the mean baseline score). The SF-36 physical and mental component scores demonstrated poorer test-retest reliability and larger SDCs (as a proportion of the mean baseline scores).
CONCLUSION: The results provide further evidence of the potential of the BIoH questionnaire to underpin research and clinical practice for people with JHS.
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