Definition
Longitudinal data analysis consists of the statistical tools and methods used to analyze data collected on the same group of individuals on multiple occasions over time.
Description
Longitudinal data, i.e., data collected on the same individuals over time, are commonly encountered in quality of life (QOL) research, because researchers are interested in how a disease or intervention affects an individual’s quality of life over time (Fairclough, 2005). Such studies generally measure the trajectory of QOL in patients with chronic or terminal diseases, in relation to their disease progression, to reveal whether different aspects of QOL become impaired over time (Swigris et al., 2005). They typically involve obtaining the same or similar assessment of QOL over time (e.g., every month) for a group of patients. Since repeated measurements assessed on the same individual over...
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© 2014 Springer Science+Business Media Dordrecht
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Das, A. (2014). Longitudinal Data Analysis. In: Michalos, A.C. (eds) Encyclopedia of Quality of Life and Well-Being Research. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0753-5_1698
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DOI: https://doi.org/10.1007/978-94-007-0753-5_1698
Publisher Name: Springer, Dordrecht
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