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Analysis of Longitudinal Data in Stata, Splus and SAS

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  • Rino Bellocco

    () (Karolinska Institutet)

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    Abstract

    Longitudinal data are commonly collected in experimental and observational studies, where both disease and risk factors are measured at different repeated times. The goal of this project is to compare analyses performed using Stata, SPlus and SAS under two different families of distributions: normal and logistic. I will show the results obtained from the analyses of two sample data sets; these will analysed using both Generalized Estimating Equation (gee) and Random Effect models. In Stata I will use both the xt programs and the routine provided by Rabe-Hesketh (glamm6): confidence intervals, hypothesis testing and model fitting will be discussed. Missing data issues will be raised and discussed as well.

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    File URL: http://fmwww.bc.edu/RePEc/nasug2001/bellocco.pdf
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    Bibliographic Info

    Paper provided by Stata Users Group in its series North American Stata Users' Group Meetings 2001 with number 4.4.

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    Date of creation: 15 Jan 2001
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    Handle: RePEc:boc:asug01:4.4

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    Web page: http://www.stata.com/meeting/1nasug
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    For corrections or technical questions regarding this item, or to correct its listing, contact: (Christopher F Baum).

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