| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| OUTPAT | OUTPAT_ICD10(O300) | Twin pregnancy | 1338 | |
| INPAT | INPAT_ICD10(O300) | Twin pregnancy | 1035 | |
| INPAT | INPAT_ICD9(6510B) | Multiple gestation, Twin pregnancy | 503 | |
| INPAT | INPAT_ICD9(6510A) | Multiple gestation, Twin pregnancy | 347 | |
| OUTPAT | OUTPAT_ICD10(O3000) | Twin pregnancy with separate amniotic and chorionic sacs | 271 | |
| INPAT | INPAT_ICD10(O3000) | Twin pregnancy with separate amniotic and chorionic sacs | 214 | |
| PRIM_OUT | PRIM_OUT_NOT_USED_ICD10(O300) | Twin pregnancy. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! | 155 | |
| OUTPAT | OUTPAT_ICD10(O3001) | Twin pregnancy with a shared chorionic sac and a separate amniotic sac | 79 | |
| INPAT | INPAT_ICD10(O3001) | Twin pregnancy with a shared chorionic sac and a separate amniotic sac | 54 | |
| 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! | 26 | |
| OUTPAT | OUTPAT_ICD10(O3002) | Twin pregnancy with a shared amniotic and chorionic sac | 12 | |
| 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! | 5 |