Original articleValidation of the Physical Activity Scale for Individuals With Physical Disabilities
Section snippets
Participants
A total of 124 subjects participated in this study, including 51 (41%) wheelchair-dependent persons. Participants were aged 16 to 65 years and had a diagnosis of spastic bilateral CP (n=56), MMC (n=47), or SCI (n=21) (table 1). Participants were identified from 3 studies focusing on daily physical activity level and physical fitness conducted at the Department of Rehabilitation Medicine and Physical Therapy, Erasmus Medical Center, or Rijndam Rehabilitation Center (both located in Rotterdam,
Results
PASIPD intensity scores were 11.3±9.1 MET-hours per day for the total group, 11.8±9.1 MET-hours per day for subjects with CP, 10.8±7.6 MET-hours per day for subjects with MMC, 10.9±12.0 MET-hours per day for subjects with SCI, 11.3±8.6 MET-hours per day for ambulatory subjects, and 11.1±9.8 MET-hours per day for nonambulatory subjects.
Table 2 lists correlation coefficients for PASIPD outcome measures and activity monitor duration. Spearman correlations ranged from .10 to .37. The highest
Discussion
In this study, an extensively validated activity monitor was used to assess the criterion validity of the PASIPD for measuring daily physical activity levels. The study assessed subjects with various physical disabilities (CP, MMC, SCI), and varying ambulation and educational levels. Therefore, we believe our results contribute to understanding the validity of the PASIPD for quantification of daily physical activity in persons with a physical disability.
Study results did not support the
Conclusions
The PASIPD correlated poorly with objective measurements using an accelerometry-based activity monitor in people with a physical disability. However, similar low correlations between objective and subjective activity measurements have been found in the general population. Users of the PASIPD should be cautious of overestimating physical activity levels.
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Supported by Kinder Fonds Adriaanstichting (grant no. 2003/0047-063), Johanna Kinder Fonds (grant nos. 2003/0047-063, 20000005/20000158, 2002/0067), and ZONmw Rehabilitation program (grant no. 1435.0003).
No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit on the authors or on any organization with which the authors are associated.
Reprints are not available from the author.
Published online April 19, 2011 at www.archives-pmr.org.