Self-Reported Disability: Association With Lower Extremity Performance and Other Determinants in Older Adults Attending Primary Care

Anabela G. Silva; Alexandra Queirós; Pedro Sa-Couto; Nelson P. Rocha

doi:10.2522/ptj.20140323

Figures

Figure.

Relationship between the Short Physical Performance Battery (SPPB) and the 12-item World Health Organization Disability Assessment Schedule (WHODAS 2.0), both presented as total scores. The linear equation is given by: WHODAS 2.0=35.8 – 2.0 × SPPB; 95% confidence interval for SPPB=−2.2, −1.8; R²=41.7%.

Tables

Table 1.

Sample Characteristics (N=504)

^a Participants could report more than one chronic health condition; therefore, percentages add up to more than 100%.

Table 2.

Short Physical Performance Battery Subtests and Number (Percentage) of Participants in Each Scoring Category

Table 3.

WHODAS 2.0 Individual Items and Number (Percentage) of Participants in Each Scoring Category^{^a}

↵^a WHODAS 2.0=12-item World Health Organization Disability Assessment Schedule. Items per domain: domain 1 (cognition)–items 3 and 6; domain 2 (mobility)–items 1 and 7; domain 3 (self-care)–items 8 and 9; domain 4 (getting along)–items 10 and 11; domain 5 (life activities)–items 2 and 12; domain 6 (participation)–items 4 and 5.

Table 4.

Multiple Linear Regression Results for Prediction of WHODAS 2.0 Scores^{^a}

↵^a Other variables considered but not significant: age and sex (with exception of domain 2). WHODAS 2.0=12-item World Health Organization Disability Assessment Schedule, SPPB=Short Physical Performance Battery.

Table 5.

Multiple Linear Regression Results for Prediction of WHODAS 2.0 Total Score (R²=61.7%, Adjusted R²=60.5%)^{^a}

↵^a Other variables considered but not significant: age, sex, education (no, yes), acute pain (no, yes), pain frequency (no pain, seldom, occasionally, often, always), number of chronic conditions. WHODAS 2.0=12-item World Health Organization Disability Assessment Schedule, SPPB=Short Physical Performance Battery, GDS=Geriatric Depression Scale, RAPA=Rapid Assessment of Physical Activity, NA=not applicable.