Validation of an independent living scale for post-acute rehabilitation applications

Abstract

The Independent Living Scale (ILS) was developed in a post-acute traumatic brain injury (TBI) rehabilitation facility over a 15-year period to assess three main areas: (1) activities of daily living, (2) behaviour, and (3) initiation. The purpose of this study was to examine the psychometric properties of the ILS, including test--retest stability, construct validity, and statistical fit. Statistical analysis was completed on all weekly scores between the years 1986-1995 (n = 5250). A previous study showed ILS inter-rater reliability to be 0.85 and convergent validity 0.82--0.87. This study demonstrated a test--retest stability of 0.72, the Kaiser-Meyer-Olkin Measure of Sampling Adequacy 0.94 (marvelous), and a Bartlett Test of Sphericity result of 'scale items independent'. The ILS was shown to have good construct validity, inter-rater reliability, internal consistency, instrument stability, and convergent validity.

The Cognitive Correlates of Functional Status: A Review From the Committee on Research of the American Neuropsychiatric Association

“…30 Loss of "insight" into functional capacities may be related to other types of anosognosia, which in turn has been associated with right hemisphere lesions and nonverbal tests of executive control, such as clock-drawing. Performance-based functional measures such as the Direct Assessment of Functional Status (DAFS), 68 the Independent Living Scale (ILS) 69 and the Structured Assessment of Independent Living Scales (SAILS) 70 may offer an alternative to traditional self-report. Wadley et al 67 examined the reliability associated with caregiver versus patient self-rated versions of financial capacity in Alzheimer's disease.…”

The IADL Profile: Development, Content Validity, Intra- and Interrater Agreement

“…When compared to previous performance-based instruments (see Fisher, 2003) and studies (see Chevignard et al, 2000), a larger number of tasks known to be relevant and problematic for individuals with TBI (see Dawson & Chipman, 1995;Kozlowski, Pollez, Thevenon, Dhellemmes, & Rousseaux, 2002) were included in the IADL Profile. As environmental barriers have been shown to limit IADL independence of individuals with TBI living in the community (Ashley, Persel, & Clark, 2001;Dawson & Chipman), the administration context selected was the individual's home and community environments. Landis & Koch (1977), items in bold represent moderate to almost perfect agreement beyond chance.…”

A chronic kidney disease patient awareness questionnaire: Development and validation

“…A Bartlett test of sphericity and Kaiser-Meyer-Olkin (KMO) measure were then used to test whether we could do the factor analysis[38–40]. Bartlett test of sphericity compares that cocrrelation matrix to the identify matrix.…”