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Hi, OHDSI
I’m curious how OHDSI classify age_group on CDM.
In Korea, we have Korea-CMS data, and many age groups are classified elaborately
as 0~10 - first / 11~20 - second / 21~30 -thrid group.
How do you classify age_group on OMOP_CDM?
Thank you
The FeatureExtraction package, which is used in various OHDSI tools including ATLAS, currently implements 5-year age bins, so 0-4, 5-9, etc.
If there’s a need we could add another analysis that uses different age groups, although I expect it will be hard to agree on which grouping 
As a statistician, I would like the finest grouping, e.g. by year … and then model as a continuous variable, allowing for non-linearity in effect … are there objections to this more refined approach?
FeatureExtraction also allows age to be output as a continuous variable, amongst others for the reason you cited.