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Subjects (n = 53) were measured at baseline on the PIADS and CCMS, and the CCMS was repeated at week 1 (n = 53) before randomization to cane and no-cane user groups.
Descriptive statistics for each CCMS and PIADS subscale score were calculated for the total sample and by subgroup (cane users/cane nonusers and sex).
Descriptive statistics for the CCMS and PIADS are displayed in Table 3.
Internal consistency reliability for the PIADS was high on all subscales, ranging from 0.
Correlations of the CCMS and PIADS subscales with use of a cane at 6 mo are displayed in Table 5.
NEI VFQ-25 is designed to measure functional vision status, while PIADS can be used to measure the impact of an assistive device designed for people with low vision.
Data were collected by telephone interviews for both PIADS and NEI VFQ-25.
Scores for PIADS competence, adaptability, and self-esteem subscales were calculated in accordance with instructions in the manual.
Multivariate repeated-measures ANOVAs were conducted with the PIADS subscale items to see if the mean differences within pairs were zero.
Abbreviations: DS = driving session, ISO = International Organization for Standardization, MMSE = Mini-Mental State Examination, NASA-TLX = National Aeronautics and Space Administration Task Load Index, PIADS = Psychosocial Impact of Assistive Devices Scale, PIDA = Power-Mobility Indoor Driving Assessment, QUEST = Quebec User Evaluation of Satisfaction with Assistive Technology.