Aaron Caldwell
@arcstats.bsky.social
Biostats nerd, Rstats fan, and R package developer. You may have known me as exphysstudent on the bird app. Website: aaroncaldwell.us
Seems like a logical name. I just had seen the same concept as a different name pubmed.ncbi.nlm.nih.gov/11113946/
Sympercents: symmetric percentage differences on the 100 log(e) scale simplify the presentation of log transformed data - PubMed
The results of analyses on log transformed data are usually back-transformed and interpreted on the original scale. Yet if natural logs are used this is not necessary--the log scale can be interpreted...
pubmed.ncbi.nlm.nih.gov
August 21, 2025 at 7:47 PM
Seems like a logical name. I just had seen the same concept as a different name pubmed.ncbi.nlm.nih.gov/11113946/
Huh interesting. I’ve not seen this called centinels before but rather sympercents.
August 21, 2025 at 7:15 PM
Huh interesting. I’ve not seen this called centinels before but rather sympercents.
I’ve implemented a couple different ways of plotting this in the TOSTER package aaroncaldwell.us/TOSTERpkg/ar...
Standardized Mean Differences
TOSTER
aaroncaldwell.us
March 3, 2025 at 5:03 PM
I’ve implemented a couple different ways of plotting this in the TOSTER package aaroncaldwell.us/TOSTERpkg/ar...
Read it and had to do a double take to understand. Looking at this, I’ve never felt so American 🤣
February 8, 2025 at 1:11 AM
Read it and had to do a double take to understand. Looking at this, I’ve never felt so American 🤣
Mind sharing the DOI? I’m curious about this one.
November 22, 2024 at 8:02 PM
Mind sharing the DOI? I’m curious about this one.
You can make these mean difference plots easily in SimplyAgree aaroncaldwell.us/SimplyAgree/
SimplyAgree R package
An R package for agreement and reliability estimation
aaroncaldwell.us
January 26, 2024 at 10:38 PM
You can make these mean difference plots easily in SimplyAgree aaroncaldwell.us/SimplyAgree/
Also a good paper that may be useful for the scenario you described pubmed.ncbi.nlm.nih.gov/10734289/
Repeated measures in clinical trials: simple strategies for analysis using summary measures - PubMed
The summary measures approach to analysing repeated measures is described. The circumstances under which it can be advantageous to use such measures are considered. Strategies for baseline adjustment ...
pubmed.ncbi.nlm.nih.gov
December 8, 2023 at 2:24 PM
Also a good paper that may be useful for the scenario you described pubmed.ncbi.nlm.nih.gov/10734289/
Ah, I had forgotten about this post. I like the simplicity of his MLM approach!
December 8, 2023 at 12:42 PM
Ah, I had forgotten about this post. I like the simplicity of his MLM approach!
Yup, not necessarily wrong approach either. IMHO, I’d prefer to report Glass delta (pre-intervention SD) peerj.com/articles/103...
December 7, 2023 at 6:14 PM
Yup, not necessarily wrong approach either. IMHO, I’d prefer to report Glass delta (pre-intervention SD) peerj.com/articles/103...
Yeah, it’s feature of the design (I’m guessing this is SMD of the change scores). Lack of concurrent control provides a conveniently large effect size
December 7, 2023 at 3:09 PM
Yeah, it’s feature of the design (I’m guessing this is SMD of the change scores). Lack of concurrent control provides a conveniently large effect size
Yeah, that’s pretty much how I’d do it (at a glance)
December 7, 2023 at 2:46 PM
Yeah, that’s pretty much how I’d do it (at a glance)
So the mixed model you had but with t1 on the “right” and t2 and t3 on the “left”
December 7, 2023 at 2:30 PM
So the mixed model you had but with t1 on the “right” and t2 and t3 on the “left”
Then I’d only include t1 as a covariate
December 7, 2023 at 2:27 PM
Then I’d only include t1 as a covariate
When is the experimental treatment exposure? Before or after t1?
December 7, 2023 at 2:19 PM
When is the experimental treatment exposure? Before or after t1?
No, that sounds entirely unreasonable. Are these limits for limits of agreement or an equivalence test.
December 6, 2023 at 1:14 AM
No, that sounds entirely unreasonable. Are these limits for limits of agreement or an equivalence test.