Statistical Analysis Stack Exchange
Statistical Analysis Stack Exchange

Questions tagged [recurrent-events]

80 questions
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How do I analytically calculate variance of a recursive random variable?

Suppose I have a chest. When you open the chest, there is a 60% chance of getting a prize and a 40% chance of getting 2 more chests. Let $X$ be the number of prizes you get. What is its variance? Computing $E[X]$ is fairly straight forward: $E[X] =…
Brian
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A regression model whose response variable is the day of year that an annual event (usually) occurs

In this particular case I'm referring to the day on which a lake freezes. This "ice-on" date only occurs once a year, but sometimes it doesn't occur at all (if the winter is warm). So on one year the lake may freeze on day 20 (january 20th), and…
rbatt
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Random effects model handling redundancies

I am trying to deal with a time-to-event analysis using repeated binary outcomes. Suppose that time-to-event is measured in days but for the moment we discretize time to weeks. I want to approximate a Kaplan-Meier estimator (but allow for…
Frank Harrell
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Cumulative hazard in the setting of Cox regression of repeated events

Cox regression is commonly extended to estimate repeated events processes (for a quick review see [ 1 ] and [ 2 ]). In Clark et al's first article in their excellent review series of survival analysis [ 3 ] cumulative hazard is explained in the…
user6571411
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Using Keras LSTM RNN for variable length sequence prediction

I have a set of sequences. Each sequence is the form $\{(s_1,l_1),(s_2,l_2) \ldots\}$ where $s_i$'s are real valued numbers and $l_i$s are labels from a fixed alphabet. It is important to note that the sequences may be of different lengths.…
curryage
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What Survival Analysis Model Should I Use?

I'm sorry if this question is too broad for this board. I'm trying to figure out a survival model for my data. Right now I have it organized by country, year, "cur" which is my main IV, and event. I have an example of my data below. My issue is my…
Daniel
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Recurrent neural network for object tracking & position filtering?

Would a recurrent neural network be appropriate for object tracking tasks? Mainly I will have 3D feature vectors $(x, y, t)$ where $x$ and $y$ are the positions of an object in the image and $t$ is either the current timecode or a number indexing…
daniel451
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Why does regression model theory not use measure-theoretic sigma-field type notation but counting process models do?

I have been studying counting process theory for time to recurrent event processes and am interested in the explicit use of the conditioning set in the model notation; $$E[dN(t)|\mathcal{F}_{t^{-}}]=\lambda(t)dt$$ where $\lambda(t)$ is called the…
dandar
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Best way to visualise timing of seasonal events?

I have a spreadsheet in which I track various seasonal event – first snow, arrival of migratory birds, that kind of thing. You can view it here. What I would love to do is be able to visualise – as I get more data over several years – those events…
James Brady
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Modelling recurrent events using Cox regression (in R)

I would appreciate a sanity check of whether I am using Cox PH regression in R correctly to analyse recurrent events. My work has used the instructions proposed in "Modelling recurrent events: a tutorial for analysis in epidemiology." Leila DAF…
Anthony Nash
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Prediction with accelerated failure time in r for clinical data

So I have the following problem and I want to discuss it with you to see if I am thinking correctly. Data description: I have recurrent data from clinical trial. The data has a specific mtest that is performed each year to indicate disease degree…
Abdal
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Survival Analysis Applied when Individuals that "Died" can still Return

I'm running an AB Test and using Survival Analysis to estimate the Return Rate to the website. Each day (in a total of 7 days) I randomly assign 100 users to group A and 100 users to group B and after 7 days I stop the test. Each day I also check…
Thiago
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Finding significant predictors of psychiatric readmissions

The set of data I am working contains nearly 17,000 independent spells (each spell consists of a number of hospital episodes) each belonging to a unique patient ID. I have spent a very long time cleaning the data to get it into a suitable format to…
Rachel
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Multivariate survival with recurrent events and spikes back to 100% alive

I am trying to solve for what seems to be a multivariate survival model, but am getting stuck as there are both recurrent events and also jumps back to 100% alive. Rephrasing the larger project in everyday terminology: Assume the survival…
sheppa28
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Recurrent events analysis software (python)

I am looking for tips for adapting usual survival analysis software to recurrent events analysis, within the framework of the Cox regression. Specifically: whether it is always possible to do? What are the limitations? Can this be done for the…
Roger Vadim
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