Thank you for your question @Pulver . The subject of Race and Ethnicity has been a topic of conversation for a while, and can be seen in the forum thread here. There is a proposal to update OMOP Race and Ethnicity here where it states that non-standard concepts such as the one you’ve mentioned ‘other race’ are mapped to 0, as well as the proposal to add additional concepts such as ‘multiple’. Though as of now, this proposal for updating has not yet been implemented. I hope these links will help you further with your question.
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