| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| OUTPAT | OUTPAT_ICD10(Q070) | Arnold-Chiari syndrome | 283 | |
| INPAT | INPAT_ICD10(Q070) | Arnold-Chiari syndrome | 138 | |
| PRIM_OUT | PRIM_OUT_NOT_USED_ICD10(Q070) | Arnold-Chiari syndrome. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! | 98 | |
| OUTPAT | OUTPAT_ICD10(Q078) | Other specified congenital malformations of the nervous system | 27 | |
| OUTPAT | OUTPAT_ICD10(Q079) | Congenital malformation of nervous system, unspecified | 12 | |
| INPAT | INPAT_ICD10(Q078) | Other specified congenital malformations of the nervous system | 7 |