# Questions tagged [censoring]

The process of censoring yields data w/ only partial information. The most common example of censoring is *right censoring* in survival analysis, where the time until the event occurred is only known to be longer than some duration because the event had not occurred when the study ended.

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### Flip the sign of covariates in Cox model

I am just curious what will happen to beta (the coefficients) and its confidence interval when I flip the sign of the covariate (multiply all elements to -1) in Cox model for right censored data.
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### Censored data - When does it matter

In survival analysis, one may arrive at a series of samples $X_1,...,X_n$, for which the outcome of a given $X$ may not be "observed" within the experiment. For instance, if the $X_i$'s are failure ...
34 views

### Cox model appropriate for my time to event problem?

I am trying to estimate the factors associated with delay in implementation of a policy. I am analyzing the delay, measured by number of days, it took an entity to implement one of three policies, ...
23 views

### Bound on Error from Censoring

Suppose I have $N$ Gaussian random variables $X_1,...,X_N$ where $X_i \sim \mathcal{N}(0,\sigma)$. Suppose I censor each $X_i$ to lie in the range $[-t,t]$. Denote the censored values by $Z_1,...,Z_N$....
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### How to do a Cox regression with progressive type I censoring?

I'm working with a problem where I have a progressive type I censoring. A batch of rats is censored after 7 days and another batch is censored after 14 days (the study ends after 14 days). The event ...
138 views

### Generating censoring times for the cox proportional hazards model

I am trying to understand the different ways of simulating survival times in a cox proportional hazards model. A simple example consists in simulating the event times following a Weibull distribution. ...