title: Measurement properties of the Activities-specific Balance Confidence Scale among individuals with stroke.
abstract: OBJECTIVE
  To examine the reliability and validity of the Activities-specific Balance Confidence (ABC) scale among individuals with stroke.
  
  
  METHODS
  Descriptive measurement study using a 4-week test-retest design. Data were collected at a tertiary rehabilitation centre form a community-dwelling sample of ambulatory older adults who sustained one stroke at least 1 year prior to the study. During the first measurement session, the total sample (n = 77) completed the ABC as well as the Berg Balance Scale (BBS) and gait speed. The reliability sample (n = 24), a subset of the larger data set, completed the ABC again 4 weeks later.
  
  
  RESULTS
  Internal consistency of the ABC was 0.94 and test-retest reliability was ICC = 0.85 (95% CI, 0.68, 0.93). A moderate significant positive, linear correlation with both the BBS (rho = 0.36, P < 0.001) and gait speed (rho = 0.48, P < 0.001) was observed. A factor analysis using principal component analysis indicated that the ABC measures two components of balance self-efficacy (component 1 = perceived low-risk activities; component 2 = perceived high-risk activities).
  
  
  CONCLUSIONS
  The ABC has acceptable measurement properties as demonstrated in this sample of individuals with stroke. This study provides further support for the use of the scale.
authors.affiliation: School of Rehabilitation Sciences, University of British Columbia, Vancouver, BC V5Z 1L8, Canada.
authors.forename: Erica M
authors.initials: EM
authors.lastname: Botner
authors.forename: William C
authors.initials: WC
authors.lastname: Miller
authors.forename: Janice J
authors.initials: JJ
authors.lastname: Eng
mesh_terms: D000368:Aged; D005163:Factor Analysis, Statistical; D005260:Female; D005684:Gait; D006801:Humans; D008297:Male; D004856:Postural Balance; D011594:Psychometrics; D015203:Reproducibility of Results; D000071939:Stroke Rehabilitation