similar to: hazard function in a Cox model

Hello , I am hoping for some advice regarding obtaining the values for the hazard function in a cox regression that I have undertaken. I have a model in the following form, analysed with the package survival (v. 2.34-1) and a log-log plot obtained using Design (v. 2.1-2). For two variables, the lines in the survival curves crossed. The statistician I been obtaining advice from (who does not

>Hello, I am hoping for assistance in regards to examining the contribution of stratified variables in a cox regression. A previous post by Terry Therneau noted that "That is the point of a strata; you are declaring a variable to NOT be proportional hazards, and thus there is no single "hazard ratio" that describes it". Given this purpose of stratification, in the

Hello, I am hoping for some advice regarding warning/error messages I received when running a Cox regression # message 1 - obtained while creating a plot of residuals > plot (NV.zph, main = "groupNUSM - UNFIT", var= 'groupNUSM') Warning messages: 1: In approx(xx, xtime, seq(min(xx), max(xx), length.out = 17)[2 * : collapsing to unique 'x' values 2: In

Hello, I have two questions regarding a survival analysis I have been working on. Below is the code to date. The variables: 1) recidivism$intDaysUntilFVPO are the number of days before an violent offence was committed - if no offence was committed than the days between court hearing and end of data collection was recorded. 2) recidivism$intDaysUntilFNVPO are the number of days before a

Hi, I've been banging my head against the following problem for a while and thought the fine people on r-help might be able to help. I'm using the survival package. I'm studying the survival rate of a population with a preexisting linear-like event rate (there are theoretical reasons to believe it's linear, but of course it's subject to the usual sampling noise) Some of the

hi, i've the following problem: i want a XP pro sp1 to join my samba (3.0.5) domain (MHC). with my first try it complained that it could not resolve: _ldap._tcp.dc._msdcs.MHC i've fixed this with the following DNS setup: ------------------------------ _ldap._tcp.MHC. 600 IN SRV 0 100 389 server.MHC.

Hi all! I have two survival data sets looking at similar effects in different settings. One data set is only right censored, but the other is interval censored. In the right censored data set, there is an effect of one factor that causes very different shapes in survival curves (and non-proportional hazards) and I'd really like to say that the same factor has a similar effect in the other

Dear All, I'm having just a little terminology problem, relating the language used in the Hosmer and Lemeshow text on Applied Survival Analysis to that of the help that comes with the survival package. I am trying to back out the values for the baseline hazard, h_o(t_i), for each event time or observation time. Now survfit(fit)$surv gives me the value of the survival function, S(t_i|X_i,B),

Dear all, I use the Andersen plot to check for proportional hazards assumption for a factor (say x) in the Cox regression model and obtained a straight line that pass through the origin. However, the formal test done by the R-function cox.zph, which is based on the plot of Schonefeld residuals against time, indicates that proportional hazards assumption is violated. Further, a plot of the score

hi, i've setup wine 0.9 on ubuntu 5.1 but it does not work. what i get is: err:module:load_builtin_dll failed to load .so lib for builtin L"winex11.drv": /usr/lib/libSM.so.6: undefined symbol: IceGetPeerName ESC(BESC) 0ESC[?1049hESC[1;24rESC[m^OESC[4lESC[?7hESC[HESC[2Jfixme:ttydrv:TTYDRV_GetBitmapBits (0x1a4, 0x7bc4f224, 128) : stub fixme:ttydrv:TTYDRV_GetBitmapBits (0x1a0,

hi, i've a debian sarge setup with samba 3.0.10 with ldap as SAM backend. every thing used to work as expected, but last week the machine went down. an analysis of the problem has showen, that with increasing uptime there is a growing number of smbd processes that caus 100% CPU utilation. tests have showen, that i can kill these processes without harming smb conecctivtiy. this is a

The following works, you need to include x=TRUE in the call to coxph. Passing the time and status variables as additional arguments is a matter of personal preference. f.coxph.zph<-function(x, timeVar, statusVar) { cox.fit <- coxph(Surv(timeVar, statusVar) ~ x, na.action = na.exclude, method = "breslow", x=TRUE) fit.zph<-cox.zph(cox.fit) fit.zph$table[,3] } time.cox <-

hi, i've setup wine with winetools and installed the baan cleint for windows. at a first sight every thing seems to work. a closer look showed a font problem. when you look at the atatched jpg's you can see, that the numbers do not fit the entry field. compare linux.jpg and windows.jpg. i'm not shure if this is a font problem or some thing else. sadly this is a killerapplication for

Hi, I wrote a function that worked well in R, but not in S-Plus, can anyone suggest a solution? > f.coxph.zph<-function(x) { cox.fit <- coxph(Surv(time.cox, status.cox) ~ x, na.action = na.exclude, method = "breslow") fit.zph<-cox.zph(cox.fit,transform='log') fit.zph$table[,3] } yyy is my data frame that contains survial time, censor status and predictor

Hello, Excuse me for a more methodological than technical question. I'm developing a Cox model with 10 covariates. One of them is age (named "eta"). I've checked proportionality with cox.zph with age continuous: > cox.zph(coxph(Surv(TTP,CENSOTTP)~eta)) rho chisq p eta -0.0154 0.0225 0.88 and categorical (eta<60): >

Hi, I''m trying to share internet on a LAN I''ve a linux router with SQUID (with ZPH support) + FAIRNAT The idea is: - fairness sharing internet - priorize interactive traffic - if a web object is on squid-cache (HIT), user can download it, with a rate = LAN rate I''ve: - Last Fairnat Script: www.metamorpher.de/fairnat/ - SQUID 2.5STABLE5 with ZPH patch

Hi, I am using the Survival package, more precisely the cox.zph function, to plot log(Hazard rate) over time. if I type plot(temp.zph[2]) then I get the plot I want. However, I want to change the label of the y axis that cox.zph prints. plot(temp.zph[2],xlab='Days', ylab='log hazard for Fast recovery cluster') then I get Error in plot.default(range(xx), yr, type =

Hi, I''ve used old ZPH patch under squid 2.4 Stable4 and it works great ! Now I want to patch squid 2.4 stable 5, with new patch, on http://www.it-academy.bg/zph/ I''ve patched and installed squid 2.5 stable 5 succefully, but I can''t get ZPH works. I''m trying with ... $TC class add dev $LANDEV parent 1: classid 1:7 htb rate 1Mbit $TC filter add dev $LANDEV

hi, i'm running smaba 3.0.4 with share level user and domain logon. as a first test i've created a direcotry using windows explorer. now i try to assing a group to this dir. when i click OK i get a messeage that tells me, that i'm not permited to do this. samba log shows: ==> log.smbd <== [2004/08/27 16:39:17, 1] smbd/service.c:make_connection_snum(619) pc48006

hi, i've a problem with samba 3.0.2. there is one windows ME client which used to work with out any problems. now, as soon as the user connects (sharelevel: user, or share - i've tried both) on smbd is forked which causes 90 to 100% cpu load. when i stop samba (smbd/nmbd) this proces does not die i can only get rid of it whit a kill -9. with this no data can be transfered from or to