process_item_difftime.RdProcess a concept_id in relationship to the time of hospital admission.
process_item_difftime(dataitem, var_name, start_time, cadance, coalesce_rows)
| dataitem | base table |
|---|---|
| var_name | concept_id |
| start_time | start_datetime to zero from |
| cadance | base time cadance |
| coalesce_rows | summary function |