| # | Column | Type | Notes |
|---|
| 1 | eid | integer | Encoded participant identifier. This identifier is the same encoded id used in the main dataset. |
| 2 | ins_index | integer | Instance index. A numerical index which together with the eid uniquely identifies the corresponding record in the main HESIN table. |
| 3 | arr_index | integer | Array index. A numerical index which together with the eid & ins_index uniquely identifies this record, i.e. eid, ins_index & arr_index together form a primary key for this table. |
| 4 | level | integer, coding 926 | Classification of diagnosis. The primary diagnosis is the main condition treated or investigated during the relevant episode. A secondary diagnosis is a clinically relevant contributory factor or issue that impacts on the primary diagnosis (including chronic conditions). An external cause is an environmental event causing injury, poisoning or other type of adverse effect. |
| 5 | diag_icd9 | string, coding 87 | Diagnoses - ICD9. Diagnoses are coded according to the International Classification of Diseases version-9 (ICD 9). |
| 6 | diag_icd9_nb | string, coding 41 | Diagnoses - ICD9 addendum. |
| 7 | diag_icd10 | string, coding 19 | Diagnoses - ICD10. Diagnoses are coded according to the International Classification of Diseases version-10 (ICD 10). |
| 8 | diag_icd10_nb | string, coding 41 | Diagnoses - ICD10 addendum. |
