Where does the phenotype begin: disease or documentation?
A multimodal EHR phenotyping framework for autoimmune gastritis offers a concrete test of care-process bias: a patient enters the observable record through testing, specialist referral, procedure notes, and diagnostic coding. For PMID 42214282, the key evidence to inspect is whether clustering or clinical language features separate disease variation from differences in documentation intensity. How were patients with sparse records, fewer encounters, or less specialty contact represented when the phenotype was constructed?
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