Survival analysis compares the statistical strength of predictors for events encoded as occuring or censored in concert with a time variable. It can be parametric or non-parametric.
Questions tagged [survival]
445 questions
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Standard Error Median Survival Time SPSS
I would like to understand how the standard error for the median survival time is calculated in SPSS 19.0
I've looked at the Algorithms document…
user1375871
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ggfortify doesn't support survfit multiple covariables?
The following example is modified from document example by adding "age"
d.coxph <- (survfit(Surv(time, status) ~ sex+age, data = lung))
autoplot(d.coxph)
I'll get the following error:
Error in levels<-(*tmp*, value = if (nl == nL)…
hlu58
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Syntax for survival analysis with late-entry
I am trying to fit a survival model with left-truncated data using the survival package however I am unsure of the correct syntax.
Let's say we are measuring the effect of age at when hired (age) and job type (parttime) on duration of employment of…
llewmills
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Compute the confidence interval of the hazard ratio of a survival regression model
I tried to get confident interval of hazard ratio in survreg() function, but it's not that straightforward as coxph.
Call:
survreg(formula = Surv(survival, DIED) ~ AGE + GENDER + PLATE +
NEUTRO + NIH, data = IMRAWandIST, dist = "exponential")
…
Nicole Wang
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SAS: plot number still surviving by # days
Given data with a number-of-days-to-event, and an outcome, like so:
data pretend ;
do subject = 1 to 1000 ;
fup_time = round(uniform(83386)*500, 1) ;
select(round(uniform(778523)*5, 1)) ;
when(1) outcome = 'cholys' ;
…
Roy Pardee
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Creating Count Process Data Set With Time-Varying Covariates in R
I am working through Chapter 15 of Applied Longitudinal Data-Analysis by Singer and Willett, on Extending the Cox Regression model, but the UCLA website here has no example R code for this chapter. I am trying to re-create the section on…
llewmills
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How to use predictSurvProb() in package "pec" to predict survival probabilities for dataset with time-dependent covariates?
I have a dataset as below:
Patient_ID Time_Start Time_End X1 X2 X3 Status
001 0 1 0
001 1 2 0
001 2 3 0
001 3 4 …
soniCYouth
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Large Dataframe slow with Lifelines Survival Analysis
I'm trying to run a survival analysis on a large dataset (about 80 rows x 12,000 cols) in python.
Currently I'm using:
from lifelines import CoxPHFitter
cf = CoxPHFitter()
cf.fit(df, duration_col='Time', event_col='Status')
But it is extremely…
zhivaga
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Survdiff Loop - P values
I'm trying to subset my current data frame with a new data frame that lists genes I'm investigating in one column and p-values in another (for each gene).
I have a data frame called m3 that looks like below:
Sample # BRCA TP53 …
Matt
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Plotting all-time risk of a variable with ggplot2 after adjusting a survival model
I am working with survival analysis and the smoothHR package, after modeling I'd like to plot the relative risk vs a variable, thing that is quite easy with
plot(dataset, predictor)
But I'd like to do it using the ggplot package. Any idea how…
Dario.gs
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Like dcast but without sum of data
I have data organized for the R survival package, but want to export it to work in Graphpad Prism, which uses a different structure.
#Example…
Crawdaunt
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Confidence interval of a product in coxph
I'm using coxph for a survival model, using three cualitative variables as independent. I know there is not an interaction between them so I just did the following model:
fit <- coxph(Surv(Time, status) ~ factor(v1) + factor(v2) + factor(v3)
My…
J Louro
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Including function from "survival" in R package
I would like to include in my R package a new function, which requires the Surv function from the survival package.
I did include import(survival) in the NAMESPACE and I have survival installed; however, when I run R CMD check, I still get this…
user2960323
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Survival Analysis Data with country-year observations
I'm trying to fit a Cox Proportional Hazard model to analyze the impact of the number of protest events on the survival rates of different political regimes in different countries.
My dataset looks similar to this:
Country year sdate …
Jonas Stenger
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Competing risks regression in Stata - stset and the competing failure
I am using Stata and completing a competing risks regression with secondary cancer diagnosis as the failure and death as a competing risk.
I am not sure if I am using the stset command correctly. The code I am using is this:-
stset diagtime,…
sophierw
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