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A variable that records something about a study unit in a longitudinal study that changes over the course of the study.
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Survival analysis with multiple time-dependent covariates
I have data on patients receiving an SPK (simultaneous pancreas-kidney) transplant. Of interest is the effect of developing the BK virus post-tx on outcomes such as death-censored graft survival. I in …
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Survival analysis - time-dependent covariate with left truncation
I have some data on patients receiving pancreas transplants. Some of these patients have a procedure done post-transplant called enteric conversion, and I am looking at the effect of this conversion a …