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1answer
43 views

Predicting with GAM, using an offset

I came in a new post because I’m quite confused with the use of an offset in gam() function (mgcv package). I’m actually working on predicting marine top predator’s distribution using aerial surveys ...
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0answers
53 views

Analysis of survival data using binomial GLM with offset

We are interested in determining whether there's an association between frequency of screening visits and cancer outcomes and whether that differs by race. We have Medicare data to analyze this. ...
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0answers
152 views

How to hand calculate parameter estimate, CI and wald test for a poisson regression that models $log\frac{\mu}{t}$?

I'm wondering if it's possible to hand calculate parameter estimate, CI and Wald test for a Poisson regression that models $log\frac{\mu}{t} = \alpha + log(t) + \beta(race)$. Given the Race 1's ...
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0answers
248 views

Calculating predictions and confidence intervals from a negative binomial distribution

I'm trying to use R's glm.nb to calculate predictions and confidence intervals. When I'm using linear models after training a model, e.g., using: ...
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0answers
176 views

Poisson Rate Regression: Offset?

I'm comparing two groups on the # of hospitalizations they have in a 5 year period. Length of hospitalization stay is highly variable. For example, a patient might have 3 hospitalizations that in ...
2
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1answer
506 views

Predict GLM poisson with offset

I know this is probably a basic question... But I don't seem to find the answer. I'm fitting a GLM with a Poisson family, and then tried to get a look at the predictions, however the offset does seem ...
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4answers
664 views

Using offset in binomial model to account for increased numbers of patients

Two related questions from me. I have a data frame which contains numbers of patients in one column (range 10 - 17 patients) and 0s and 1s showing whether an incident happened that day. I'm using a ...