| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| OUTPAT | OUTPAT_ICD10(O300) | Twin pregnancy | 1720 | |
| INPAT | INPAT_ICD10(O300) | Twin pregnancy | 1289 | |
| INPAT | INPAT_ICD9(6510B) | Multiple gestation, Twin pregnancy | 625 | |
| INPAT | INPAT_ICD9(6510A) | Multiple gestation, Twin pregnancy | 420 | |
| OUTPAT | OUTPAT_ICD10(O3000) | Twin pregnancy with separate amniotic and chorionic sacs | 395 | |
| INPAT | INPAT_ICD10(O3000) | Twin pregnancy with separate amniotic and chorionic sacs | 303 | |
| PRIM_OUT | PRIM_OUT_NOT_USED_ICD10(O300) | Twin pregnancy. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! | 223 | |
| OUTPAT | OUTPAT_ICD10(O3001) | Twin pregnancy with a shared chorionic sac and a separate amniotic sac | 131 | |
| INPAT | INPAT_ICD10(O3001) | Twin pregnancy with a shared chorionic sac and a separate amniotic sac | 89 | |
| PRIM_OUT | PRIM_OUT_NOT_USED_ICD10(O3000) | Twin pregnancy with separate amniotic and chorionic sacs. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! | 47 | |
| OUTPAT | OUTPAT_ICD10(O3002) | Twin pregnancy with a shared amniotic and chorionic sac | 14 | |
| PRIM_OUT | PRIM_OUT_NOT_USED_ICD10(O3001) | Twin pregnancy with a shared chorionic sac and a separate amniotic sac. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! | 11 | |
| INPAT | INPAT_ICD10(O3002) | Twin pregnancy with a shared amniotic and chorionic sac | 7 |