All Questions
13
questions
0
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19
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Analyzing discrete Proportional Data with different sample sizes in GLMM?
I am reaching out to seek guidance regarding an issue that has been troubling me for a while.
In my study, I had participants choose a strategy for expressing 6 different emotions across * 5 social ...
- 1
2
votes
1
answer
36
views
Need some help/guidance on GLMM questions
Newbie with linear mixed modelling here. Need some advice/help on my problem detailed below.
Dataset below with assessments taken at different visits: baseline (visit=1), and then at 30 days, 60 days ...
- 69
3
votes
1
answer
328
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glmer (R) versus SAS output random effects
I have a binomial glmm model which I have analysed in both SAS and R. However, I have noticed a difference in the statistics which are given for the random effect. In SAS, there is a table called '...
- 111
1
vote
0
answers
57
views
Validity of setting Singular=1 in proc GLM Contrast statement (SAS)
I am running a proc GLM in SAS with specific contrasts, one of which is included in the code below. With the following code, all my contrasts are always unestimable:
...
- 229
0
votes
1
answer
56
views
Accounting for person-time exposed in a binomial GLMM
I have a large data set where we have 5 calendar years data for each person, and we have information about the number of outcomes (taking values 0,1,or 2) each year. We have to account for the ...
- 231
0
votes
1
answer
793
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Repeating AIC values with proc Glimmix in SAS
I am comparing several models using PROC GLIMMIX, and many of my models are coming out with the exact same AIC value, even when new variables are added. For example, the code below yields the exact ...
- 11
1
vote
1
answer
412
views
Building a Generalized Linear Mixed Model in SAS
I am building a generalized linear mixed model in SAS. Unfortunately, this is the first time I’m working with GLMMs and I am not very familiar with SAS. I have been using proc GLIMMIX. I have data ...
- 11
3
votes
1
answer
6k
views
glmer in R to recreate GLIMMIX from SAS
I am trying to recreate a PROC GLIMMIX command in R using glmer. Here is a link to the data (from SAS product support GLIMMIX documentation): https://support.sas.com/documentation/cdl/en/statug/63033/...
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0
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0
answers
819
views
Use of weights in PROC GLIMMIX
I am looking to implement a generalised linear mixed model in SAS using PROC GLIMMIX. The data is from a survey, and a single ...
- 349
3
votes
0
answers
260
views
Modeling Correlated Binary Data
I have data which looks like this:
Subject ID (unique identifier), Group (Treatment or Control), Eye (Left / Right), Outcome (Success / Failure).
The data is coming from a trial testing a new ...
- 795
4
votes
1
answer
3k
views
Interpretation of covariance estimates glmm (proc glimmix)
I am using the glimmix procedure in SAS to model a generalize linear mixed model with and binomial distribution and a logit link function. I am modeling both the G-side and the R-side covariance ...
0
votes
1
answer
1k
views
Calculating effect & CI of continuous variable when class covariates are set to their mean
I'm trying to plot the effect of a continuous variable (VAR1) on the response from a Generalized Linear Mixed Model. In other words, I'd like to predict the response y when VAR1 is x, setting all ...
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4
votes
0
answers
648
views
GLMM with 2 insignificant variables has lower AIC or BIC compared to same model without those variables...?
Background
This post has been heavily edited from its previous version (three months ago).
I am investigating habitat selection of 35 territorial wolves over several years of denning seasons (41 ...
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