Background: Disease-specific Quality Of Life (QOL) measures are devised to assess the impact of a specific disease across a spectrum of important domains of life. The purpose of this study was to ...

This is a preview. Log in through your library . Abstract The choice among a longitudinal, mixed longitudinal, or cross-sectional design is often called for in educational and psychological research.

This is a preview. Log in through your library . Abstract Three sources of data for studies of growth (matched longitudinal, unmatched longitudinal, and cross-sectional) were compared using mean ...