OBJECTIVE: To develop a measure of illness self-management for adults living with antineutrophil cytoplasmic antibody (ANCA)-associated small-vessel vasculitis (ANCA-SVV) and to gather evidence of its reliability and validity. METHODS: Development of the Vasculitis Self-Management Scale (VSMS) was guided by previous research on self-management in other chronically ill populations, a review of the current treatment literature for ANCA-SVV, interviews with patients, and consultation with experts. A total of 205 patients living with ANCA-SVV or a closely related condition then completed the VSMS, along with measures of sociodemographic and clinical variables, social desirability bias, and general adherence to medical recommendations, using a self-administered mailed questionnaire. A principal components analysis was conducted on the VSMS items. Internal consistency reliability and construct validity of the resulting subscales were assessed. Forty-four patients completed the VSMS a second time, for the purpose of assessing test-retest reliability. RESULTS: Analyses suggested an 8-factor solution. The final VSMS consisted of 43 items representing these 8 behavioral domains. Correlations among the 8 domains were null to modest in magnitude. The internal consistency reliability of the 8 subscales ranged from minimally acceptable (alpha = 0.67) to excellent (alpha = 0.94), and correlations between subscale scores at time 1 and time 2 suggested good temporal stability. Preliminary evidence for validity was mixed. CONCLUSION: These findings suggest that the VSMS is a promising method for assessing illness self-management in adults with ANCA-SVV. More research exploring the validity of the measure is warranted.
OBJECTIVE: To develop a measure of illness self-management for adults living with antineutrophil cytoplasmic antibody (ANCA)-associated small-vessel vasculitis (ANCA-SVV) and to gather evidence of its reliability and validity. METHODS: Development of the Vasculitis Self-Management Scale (VSMS) was guided by previous research on self-management in other chronically ill populations, a review of the current treatment literature for ANCA-SVV, interviews with patients, and consultation with experts. A total of 205 patients living with ANCA-SVV or a closely related condition then completed the VSMS, along with measures of sociodemographic and clinical variables, social desirability bias, and general adherence to medical recommendations, using a self-administered mailed questionnaire. A principal components analysis was conducted on the VSMS items. Internal consistency reliability and construct validity of the resulting subscales were assessed. Forty-four patients completed the VSMS a second time, for the purpose of assessing test-retest reliability. RESULTS: Analyses suggested an 8-factor solution. The final VSMS consisted of 43 items representing these 8 behavioral domains. Correlations among the 8 domains were null to modest in magnitude. The internal consistency reliability of the 8 subscales ranged from minimally acceptable (alpha = 0.67) to excellent (alpha = 0.94), and correlations between subscale scores at time 1 and time 2 suggested good temporal stability. Preliminary evidence for validity was mixed. CONCLUSION: These findings suggest that the VSMS is a promising method for assessing illness self-management in adults with ANCA-SVV. More research exploring the validity of the measure is warranted.
Authors: C T Thorpe; R F DeVellis; S J Blalock; S L Hogan; M A Lewis; B M DeVellis Journal: Rheumatology (Oxford) Date: 2008-04-09 Impact factor: 7.580
Authors: Lorie L Geryk; Susan J Blalock; Robert F DeVellis; Joanne M Jordan; Paul K J Han; Delesha M Carpenter Journal: Open Rheumatol J Date: 2016-09-30
Authors: Dayna S Alexander; Susan L Hogan; Joanne M Jordan; Robert F DeVellis; Delesha M Carpenter Journal: Patient Prefer Adherence Date: 2017-01-12 Impact factor: 2.711