Export unmapped (concept_id = 0) codes aggregated by frequency ready for OHDSI Usagi

Export unmapped (concept_id = 0) codes aggregated by frequency ready for OHDSI Usagi

Usage

export_unmapped_codes(con, table_name, output_csv, min_frequency = 1)

Arguments

con

Active DuckDB connection

table_name

Name of OMOP table (e.g. condition_occurrence, drug_exposure, measurement, procedure_occurrence, provider)

output_csv

Path to write the output CSV

min_frequency

Minimum occurrence count to include

Value

Number of unique unmapped codes exported