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Table 2 Example of laboratory instrument output, the data is modeled as EAV

From: Merging clinical chemistry biomarker data with a COPD database - building a clinical infrastructure for proteomic studies

pat_id visit_id exacerbation_id Date Attribute Value
100001 visit_1   150321 calcium 6.2
100001 visit_1   150321 leukocytes 6.5
100002 visit_1   150321 calcium 2.45
100002 visit_1   150321 leukocytes 6.5
100001 visit_2   150917 calcium 2.51
100001 visit_2   150917 leukocytes 6.2
100002   exacerbation_1 150613 calcium 2.44
100002   exacerbation_1 150613 leukocytes 8.1