Hello Chris, Thanks. This is not as straight forward as it seems.
Given an index release date, I have dates of prior and subsequent imprisonment, offending that results in re-incarceration and hospital admission dates, pre and post. There are some additional complexities, such as people released from custody straight to a psychiatric hospital, and transfers the other way, which can inflate the recidivism rates. Regards Bob > Hi John, > That must be in Canada, where everyone is a thug, unlike here in the US. > :-) > > But seriously, you make a good point. I guess it depends on what the > event variable is: commission of a new crime, start of a new sentence, > reincarceration after a period of freedom, etc. (and what data Bob has). > If a person is found guilty of two crimes (e.g. two robberies in a single > spree) and the jail terms are to be served consecutively, is that one > event or two? > > Chris > > -----Original Message----- > From: John Kane [mailto:jrkrid...@inbox.com] > Sent: Wednesday, June 11, 2014 9:13 AM > To: Andrews, Chris; Bob Green > Cc: r-help@r-project.org > Subject: Re: [R] Recurrent analysis survival analysis data format question > > Hi Chris, > Why would you not consider the person at risk for re incarceration if he > is currently imprisoned? > > Symantically I'd agree, he or she is already behind bars. But from the > point of view of extra sentences it is quite possible to commit an offence > while in prision and recieve another sequential sentence. > > We have a current case here where three people, already incarcerated, are > just been charged with attempted murder. > > John Kane > Kingston ON Canada > > >> -----Original Message----- >> From: chri...@med.umich.edu >> Sent: Tue, 10 Jun 2014 19:02:30 +0000 >> To: bgr...@dyson.brisnet.org.au >> Subject: Re: [R] Recurrent analysis survival analysis data format >> question >> >> I wouldn't consider the person at risk for re incarceration if he is >> currently imprisoned. So I wouldn't use those intervals as part of the >> response variable. Perhaps time in custody would be a covariate used to >> model the time until re incarceration. One variable that is commonly >> needed for analysis of recurrent data is the number of previous events. >> It can be used to, e.g., stratify. >> >> Chris >> >> >> -----Original Message----- >> From: Bob Green [mailto:bgr...@dyson.brisnet.org.au] >> Sent: Tuesday, June 10, 2014 2:32 AM >> To: r-help@r-project.org >> Subject: [R] Recurrent analysis survival analysis data format question >> >> Hello, >> >> I'm hoping for advice regarding how to set up a recurrent event >> survival analysis data file. My data consists of people released from >> custody, with survival time being measured as days before re >> imprisonment or end of the study. In the example below, id 5155 is >> released 5 times and jailed five times. All events are therefore >> true. Daysfree is the difference in days between release and return >> to custody. Id 7155 is released 3 times and only re-imprisoned >> twice, so the third event value is false. >> >> id <- c(5155, 5155,5155,5155, 7155, 7155,7155) >> Release <- c("29/10/10","9/01/11", "25/03/12", "15/10/13", "9/01/10", >> "16/12/12","29/10/13") >> JailNew <- c("1/12/10","01/12/11", "27/09/12", "24/01/14", >> "22/09/12","24/01/12","24/01/14") >> DaysFree <- c(24,234,134,74,709,29,64) >> Event <- c("true", "true", "true", "true", "true", "true", "false" ) >> DF1<- data.frame(id, Release, JailNew, DaysFree, Event) >> DF1 >> >> After speaking to a statistician today I'm not sure if I my method >> of formatting the data is correct. Should all time intervals be >> included, not just the period from release to event/end of study >> period. Currently period imprisoned is not counted. For example, >> for id 5155, would I also include 1/12/10 - 9/01/11 etc, which would >> be FALSE for event and have a duration of 39 days; and then include >> all the other similar intervals as well. The statistican thought >> including this additional information more closely resembled the >> bladder1 data in the Survival package. >> >> Any assistance is appreciated, >> >> Regards >> >> Bob >> >> >> ********************************************************** >> Electronic Mail is not secure, may not be read every day, and should not >> be used for urgent or sensitive issues >> >> ______________________________________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. > > ____________________________________________________________ > Publish your photos in seconds for FREE > TRY IM TOOLPACK at http://www.imtoolpack.com/default.aspx?rc=if4 > > > ********************************************************** > Electronic Mail is not secure, may not be read every day, and should not > be used for urgent or sensitive issues > > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
