Article

The aim of this study was to determine the reliability and discriminant validity
of the Dutch version of the life satisfaction questionnaire (Lisat-9 DV) to
assess patients with an acquired brain injury. The reliability study used a
test-retest design, and the validity study used a cross-sectional design. The
setting was the general rehabilitation centre. There were 159 patients over 18
years of age, with an acquired brain injury, in the chronic phase. The main
outcome measures were weighted kappa of test and retest data on the nine
questions of the Lisat-9 DV and significance levels of differences between
subgroups of patients who are expected to differ in terms of Lisat-9 scores, on
the basis of other instruments. The results were as follows: the reliability was
moderate, with the weighted kappa ranging from 0.41 to 0.64. In terms of
validity, subgroups of patients who were expected to differ in terms of the
Lisat-9 domains did indeed differ significantly, except for the difference in the
Lisat score for 'contact with friends and acquaintances' between subgroups
defined by higher or lower scores on the corresponding domain of the Frenchay
Activities Index. As there was a plausible explanation for not finding a
significant difference between subgroups defined by one of the Frenchay
Activities Index domains and significant differences were found between the
subgroups defined by other instruments corresponding to the same domain, we
conclude that the discriminant validity is good. The reliability was not clearly
affected by cognitive disorder or aphasia. The conclusions were that the
reliability of the Lisat-9 DV for patients with an acquired brain injury was
moderate; the discriminant validity was good.

Langue : ANGLAIS