Table name: visit_occurrence
Reading from baseline
One person can have up to 4 visits (labeled 0-3). Follow-up online or to assessment center.

| Destination Field | Source field | Logic | Comment field | |
|---|---|---|---|---|
| visit_occurrence_id | eid instance | Concatenate 1, eid and instance | ||
| person_id | eid | |||
| visit_concept_id | 44818519 - Clinical Study visit | |||
| visit_start_date | 53- | Field 53-0.0 -> date of initial assessment visit Field 53-1.0 -> date of repeat assessment visit Field 53-2.0 -> date of first imaging visit Field 53-3.0 -> date of second imaging visit | Capture different record for each instance | |
| visit_start_datetime | 53- | Same as mapping to visit_start_date | ||
| visit_end_date | 53- | Same as mapping to visit_start_date | ||
| visit_end_datetime | 53- | Same as mapping to visit_start_date | ||
| visit_type_concept_id | 32883 - Survey | |||
| provider_id | ||||
| care_site_id | 54- | If field 54- | ||
| visit_source_value | ||||
| visit_source_concept_id | ||||
| admitting_source_concept_id | ||||
| admitting_source_value | ||||
| discharge_to_concept_id | ||||
| discharge_to_source_value | ||||
| preceding_visit_occurrence_id | ||||
| record_source_value | ‘baseline- | |||
| data_source | ‘baseline’ |