PTEDUCAT and other variable definitions
Nalani Knight
Lijun An
So I think you could refer ADNI manual firstly. If you could not get information you want, there is a ask question page you could send email for help.
Best Regards,
An Lijun
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Lijun An
Best Regards,
An Lijun
Danielle J Harvey
As was stated earlier, the ADNIMERGE file is pulled together from individual csv files that are also available on the Study Data page of the ADNI website. This file was created to provide a dataset with many of the commonly utilized variables, so that users wouldn’t have to merge files on their own.
You might find additional information in the data dictionary for the overall study (DATADIC.csv), but also referring to the R code that generates the ADNIMERGE file will give you some information about what the different variables represent.
The Ask the Experts (and associated database of questions) is a place to either ask questions or search previous questions to see if there is an answer already available. You should be able to direct questions to the Clinical Core who can provide more information about a particular piece of information being collected.
Education is years of education – 12 years will generally refer to high school, 16 years will be college, etc.
Danielle
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Nalani Knight
On Friday, March 20, 2020 at 12:19:22 PM UTC-4, Danielle Harvey wrote:
As was stated earlier, the ADNIMERGE file is pulled together from individual csv files that are also available on the Study Data page of the ADNI website. This file was created to provide a dataset with many of the commonly utilized variables, so that users wouldn’t have to merge files on their own.
You might find additional information in the data dictionary for the overall study (DATADIC.csv), but also referring to the R code that generates the ADNIMERGE file will give you some information about what the different variables represent.
The Ask the Experts (and associated database of questions) is a place to either ask questions or search previous questions to see if there is an answer already available. You should be able to direct questions to the Clinical Core who can provide more information about a particular piece of information being collected.
Education is years of education – 12 years will generally refer to high school, 16 years will be college, etc.
Danielle
From: adni...@googlegroups.com <adni...@googlegroups.com> On Behalf Of Lijun An
Sent: Friday, March 20, 2020 7:03 AM
To: adni...@googlegroups.com
Subject: Re: [adni-data] PTEDUCAT and other variable definitions
Sorry I mean there is a ask question page on ADNI official website.
I tried asking questions via this link and got response very quickly.
http://adni.loni.usc.edu/support/experts-knowledge-base/ask-experts/
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Best Regards,
An Lijun
Lijun An <anli...@gmail.com> 于 2020年3月20日周五 21:58写道：
Have you checked ADNI manual ?
I would say ADNI_MERGE is just grabbed from ADNI csvs by a R package.
From my personal perspective, you are recommended to read source code of adni_merge. It helps me figure out what I am confused.
So I think you could refer ADNI manual firstly. If you could not get information you want, there is a ask question page you could send email for help.
I found this group is not so active actually. Hope my words could help you.
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Best Regards,
An Lijun
Nalani Knight <knala...@gmail.com> 于 2020年3月20日周五 19:36写道：
Hey everyone!
I'm new to this group and wish I'd joined much earlier in my research!
Question: does anyone happen to know where I can find a more detailed description of the variables in the data set adnimerge? I downloaded the file "VariableDescriptions_ADNIMERGE", but the list does not cover every variable and it also is not very detailed! For instance, I'm assuming PTEDUCAT is the number of years of education, but the description only states "Education". Also it doesn't define at what point you started counting. If I assumed 1st grade, then someone who only went to high school has a 12, four years of college would make this 16, Masters is 18? But then the maximum of this variable is 20. There are professors and doctors (per PTWORK) in the sample who go to school much longer. The number of years required for a terminal degree varies by field. So, I would like to create a categorical variable that provides the level of education rather than the years someone spent in school. This is just one example of the lack of detail in the file mentioned. Please help point me to a paper, file or anything that will give me more clear information.
I really appreciate your help!
Sincerely,
Nalani
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