N. Hoeymans et al., MEASURING FUNCTIONAL STATUS - CROSS-SECTIONAL AND LONGITUDINAL ASSOCIATIONS BETWEEN PERFORMANCE AND SELF-REPORT (ZUTPHEN ELDERLY STUDY 1990-1993), Journal of clinical epidemiology, 49(10), 1996, pp. 1103-1110
Citations number
41
Categorie Soggetti
Public, Environmental & Occupation Heath","Medicine, General & Internal
We investigated cross-sectional as well as longitudinal associations b
etween performance-based measures of functional status and self-report
ed measures of functional status. In the Zutphen Elderly Study, 494 me
n, born between 1900 and 1920, were examined in 1990, of whom 303 were
reexamined in 1993. A performance score was constructed on the basis
of four tests: standing balance, walking speed, ability to rise from a
chair, and external shoulder rotation. Self-reported functional statu
s was based on disabilities in basic activities of daily living, mobil
ity, and instrumental activities of daily living. A hierarchic disabil
ity scale was constructed. Cross-sectional correlation coefficients be
tween the performance score and the disability scale were 0.22 in 1990
and 0.39 in 1993. Correlations were highest between the test for walk
ing speed and self reported mobility and IADL, and between the test fo
r external shoulder rotation and self-reported disabilities in basic a
ctivities of daily living, The correlation between the 3-year changes
in performance and in self-report was 0.20 (p < 0.001). Both performan
ce and self report at baseline predicted performance and self-report a
fter 3 years.Performance-based measures of functional status are cross
-sectionally and longitudinally associated at modest levels with self
reported disabilities. Performance measures and self-reported measures
are complementary, but do not measure the same construct.