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Results tagged with r
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user 340322
Use this tag for any *on-topic* question that (a) involves `R` either as a critical part of the question or expected answer, & (b) is not *just* about how to use `R`.
0
votes
1
answer
223
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Follow-up time with too many zeros?
I have a dataset of 1500 patients for a time-to-event study. Almost half the population died at the moment of inclusion into the study which means that they have had a follow-up time of zero. Now I wa …
- 51
1
vote
1
answer
2k
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Missing data in survival analysis (time-to-event; event)
I am performing survival analysis (Kaplan-Meier, Cox-regression) for 1500 patients. I noticed that I have missing values for 15 patients in regards to their time-to-event and their dichotomous outcome …
- 51
1
vote
1
answer
70
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Visualizing restricted cubic splines in glm.nb
I am trying to visualize the relationship between a continuous variable ("marker") and a count variable ("count") using a negative binomial regression with a restricted cubic spline term.
Now I wanted …
- 51
1
vote
1
answer
354
views
Can one use NRI and IDI in regularized cox-regression?
I have a dataset with 1500 patients for which I want to predict the outcome of death.
I wanted to utilize multivariate cox-regression in a model containing biomarkers and other covariates. I was told …
- 51
0
votes
2
answers
243
views
Significant Kaplan-meier curves
I am currently doing some research on cardiac arrests in R.
I've constructed some Kaplan-Meier curves, which showed me a significant p-value for the log-rank test. …
- 51
0
votes
1
answer
70
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Cox regression with two-way interaction and interaction p value
Hi I am using Cox regression to do some survival analysis.
I have one continous predictor variable called "biomarker" and two binary categorical variables sex and diabetes.
I want to get the interacti …
- 51