Background. Quality of life is an important health outcome for older persons. It
predicts the adverse outcomes of institutionalization and premature death. The aim of
this cross-sectional study was to determine the influence of both disability in activities
of daily living (ADL) and instrumental activities of daily living (IADL) on physical and
mental dimensions of quality of life.
Methods. A total of 377 Dutch people aged 75 years and older completed a web-based
questionnaire. This questionnaire contained the Groningen Activity Restriction Scale
(GARS) for measuring ADL and IADL and the Short-Form Health Survey (SF-12) for
measuring quality of life. The SF-12 distinguishes two dimensions of quality of life, a
physical and mental dimension.