Question
Question Posted 06/08/22:
Hi, I downloaded the ADNIMERGE.csv, and have a question on the ADNI1 dataset. Why is the age column constant for a particular patient ? For example, corresponding to RID = 4, we get 6 different Visit Codes - bl, m06, m12, m18, m36, m30 &
for all these visits the age of the corresponding patient is same i.e., 67.5 but technically the age of the patient must increase with each visit ?
Hi, I downloaded the ADNIMERGE.csv, and have a question on the ADNI1 dataset. Why is the age column constant for a particular patient ? For example, corresponding to RID = 4, we get 6 different Visit Codes - bl, m06, m12, m18, m36, m30 &
for all these visits the age of the corresponding patient is same i.e., 67.5 but technically the age of the patient must increase with each visit ?
Response posted 06/08/22 by Danielle:
The age variable in ADNIMERGE corresponds to the baseline age, so it is the same value across all visits.
Response posted 06/08/22 by Prachi Gupta:
Thanks for the quick response, can I get the complete dataset ?
Response posted 06/08/22 by Danielle:
You have the dates of the visits in ADNIMERGE, so you can compute the age at each visit, if you want. The patient demographics file (also available for download on the Study Data page) contains year and month of birth that you can also use to compute approximate age at each visit.
Response posted 06/08/22 by Prachi Gupta:
Thanks, I would like to know the exact difference amongst ADNI1, ADNI2, ADNI3 & ADNIGO.
Response posted 06/08/22 by Prachi Gupta:
Thanks, I would like to know the exact difference amongst ADNI1, ADNI2, ADNI3 & ADNIGO.
Response posted 06/08/22 by Danielle:
There is a lot of information about the different phases of ADNI on the website,. Please refer to the information there. If you need clarification about something specific, feel free to raise the question!
