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http://hdl.handle.net/1942/1571
Title: | A comparison of procedures to correct for base-line differences in the analysis of continuous longitudinal data: a case-study | Authors: | VERBEKE, Geert FIEUWS, Steffen LESAFFRE, Emmanuel Kato, B.S. Foreman, M.D. Broos, P.L.O. Milisen, Koen |
Issue Date: | 2006 | Source: | JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS, 55(1). p. 93-101 | Abstract: | The main advantage of longitudinal studies is that they can distinguish changes over time within individuals (longitudinal effects) from differences between subjects at the start of the study (base-line characteristics; cross-sectional effects). Often, especially in observational studies, subjects are very heterogeneous at base-line, and one may want to correct for this, when doing inferences for the longitudinal trends. Three procedures for base-line correction are compared in the context of linear mixed models for continuous longitudinal data. All procedures are illustrated extensively by using data from an experiment which aimed at studying the relationship between the post-operative evolution of the functional status of elderly hip fracture patients and their preoperative neurocognitive status. | Keywords: | base-line correction; linear mixed model; longitudinal data; longitudinal trends; EFFECTS MODELS | Document URI: | http://hdl.handle.net/1942/1571 | ISSN: | 0035-9254 | e-ISSN: | 1467-9876 | DOI: | 10.1111/j.1467-9876.2005.00531.x | ISI #: | 000235710800007 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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j.1467-9876.2005.00531.pdf | Peer-reviewed author version | 112.15 kB | Adobe PDF | View/Open |
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