The ADL-staircase: further validation.
The aim was to psychometrically evaluate the activities of daily living (ADL)-staircase in various age groups. This age stratified, cross-sectional study comprised 826 individuals aged 18-102 years. The factor structure was assessed by means of hierarchical cluster analyses, plots and analyses of nonclassifiable responses. Reliability was assessed in terms of internal consistency. In general, the
