Singer & Willett (2003) also cover this ground. Singer, JD & Willett, JB (2003). Applied longitudinal data analysis: Modeling change and event occurrence. New Yok: Oxford University Press.
-----Original Message----- From: Frank E Harrell Jr <[EMAIL PROTECTED]> Sent: Jul 29, 2005 9:25 AM To: John Sorkin <[EMAIL PROTECTED]> Cc: R-help@stat.math.ethz.ch Subject: Re: [R] Binary outcome with non-absorbing outcome state John Sorkin wrote: > I am trying to model data in which subjects are followed through time to > determine if they fall, or do not fall. Some of the subjects fall once, > some fall several times. Follow-up time varies from subject to subject. > I know how to model time to the first fall (e.g. Cox Proportional > Hazards, Kaplan-Meir analyses, etc.) but I am not sure how I can model > the data if I include the data for those subjects who fall more than > once. I would appreciate suggestions about a models that I could use, > how I would quantify the follow-up time, how I account for the imbalance > in the data (some subjects would contribute one outcome measure, others > multiple measures), etc. > > Many thanks, > John A great reference for this is @Book{the00mod, author = {Therneau, Terry and Grambsch, Patricia}, title = {Modeling Survival Data: Extending the Cox Model}, publisher = {Springer-Verlag}, year = 2000, address = {New York} } Frank > > John Sorkin M.D., Ph.D. > Chief, Biostatistics and Informatics > Baltimore VA Medical Center GRECC and > University of Maryland School of Medicine Claude Pepper OAIC > > University of Maryland School of Medicine > Division of Gerontology > Baltimore VA Medical Center > 10 North Greene Street > GRECC (BT/18/GR) > Baltimore, MD 21201-1524 > > 410-605-7119 > --- NOTE NEW EMAIL ADDRESS: > [EMAIL PROTECTED] > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Frank Funderburk Converting Data to ... Information for Action .........................Through Understanding [EMAIL PROTECTED] voice mail: 888-431-7594 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html