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an old Russian measurement of length, equal to the distance between the tips of the outstretched thumb and index finger. In modern Russian the word piad’ is encountered only in the figurative sense, in the expressions piad’ zemli (a small piece of land), ni piadi (meaning not to yield an inch), and semi piadei vo Ibu (said of a very intelligent and capable person).

References in periodicals archive ?
Correlations of the CCMS and PIADS subscales with use of a cane at 6 mo are displayed in Table 5.
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.
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, .