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How do I interpret the HRs for each time interval computed by survSplit in R?

Question 1. If you have two time intervals separated out by survSplit() at time = 18, then you effectively have two separate ...
EdM's user avatar
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1 vote
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When should the robust error function in R be used in Cox proportional hazard regressions?

Question 1. There are several types of robust standard errors that can provide useful estimates of the (co)variances of regression coefficient estimates when model assumptions aren't met. Besides the ...
EdM's user avatar
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How to include drug exposure periods in a time to event analysis?

In my opinion, this is very imprecise. ID 2, for example initiated Drug C on 2011-08-27 and was exposed for 10 months. Thus, ...
geek45's user avatar
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2 votes

Assessing Proportional Hazards Assumption in Survival Analysis

You may have a multiplicity problem hen assessing PH for many predictors. Use the R survival package coxph function and then ...
Frank Harrell's user avatar

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