The aim of this study was to evaluate the reliability and validity of the CCMS and PIADS in a sample of older adults with knee OA.
Test-retest reliability of the PIADS was not assessed in this study because of the data collection schedule established in the main study; however, prior studies have documented good test-retest reliability, with intraclass correlation coefficients ranging from 0.
Our study is the first to evaluate the psychometric properties of the CCMS and PIADS in a sample of subjects with OA and, thus, provides a starting point to investigate strategies for recommending assistive devices based on initial patient screening using these instruments.
Abbreviations: CCMS = Cane Cognitive Mediator Scale, OA = osteoarthritis, PIADS = Psychosocial Impact of Assistive Devices Scale, QUEST = Quebec User Evaluation of Satisfaction with Assistive Technology, VA = Department of Veterans Affairs, WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index.
Variable PIADS Intended Application Measures effect of assistive device (all categories of assistive technology) on quality of life and sense of well- being.
The descriptive statistics on the PIADS subscales are presented in Table 2.
Figure 2 presents the mean PIADS subscale scores for each postadoption inter view.
Paired t-tests were performed on the PIADS subscales between 2 weeks and 1 month, between 1 month and 3 months, between 3 months and 6 months, and between 2 weeks and 6 months (see Table 3).
Bivariate correlations (Pearson's r) between the NEI VFQ-25 and the PIADS subscales were statistically non-significant (using the Bonferroni adjustment, .
The PIADS mean scores indicated a significant psychosocial impact from the use of CCTVs that did not peak until around one month after the devices were adopted.