| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| OUTPAT | OUTPAT_ICD10(O300) | Twin pregnancy | 1947 | |
| INPAT | INPAT_ICD10(O300) | Twin pregnancy | 1458 | |
| INPAT | INPAT_ICD9(6510B) | Multiple gestation, Twin pregnancy | 681 | |
| OUTPAT | OUTPAT_ICD10(O3000) | Twin pregnancy with separate amniotic and chorionic sacs | 473 | |
| INPAT | INPAT_ICD9(6510A) | Multiple gestation, Twin pregnancy | 454 | |
| INPAT | INPAT_ICD10(O3000) | Twin pregnancy with separate amniotic and chorionic sacs | 369 | |
| PRIM_OUT | PRIM_OUT_NOT_USED_ICD10(O300) | Twin pregnancy. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! | 253 | |
| OUTPAT | OUTPAT_ICD10(O3001) | Twin pregnancy with a shared chorionic sac and a separate amniotic sac | 164 | |
| INPAT | INPAT_ICD10(O3001) | Twin pregnancy with a shared chorionic sac and a separate amniotic sac | 120 | |
| OUTPAT | OUTPAT_ICD10(O301) | Triplet pregnancy | 66 | |
| 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! | 64 | |
| INPAT | INPAT_ICD10(O301) | Triplet pregnancy | 43 | |
| OUTPAT | OUTPAT_ICD10(O309) | Multiple gestation, unspecified | 36 | |
| INPAT | INPAT_ICD9(6511B) | Multiple gestation, Triplet pregnancy | 27 | |
| INPAT | INPAT_ICD9(6511A) | Multiple gestation, Triplet pregnancy | 21 | |
| 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! | 20 | |
| OUTPAT | OUTPAT_ICD10(O3002) | Twin pregnancy with a shared amniotic and chorionic sac | 17 | |
| OUTPAT | OUTPAT_ICD10(O302) | Quadruplet pregnancy | 10 | |
| OUTPAT | OUTPAT_ICD10(O30) | Multiple gestation | 9 | |
| OUTPAT | OUTPAT_ICD10(O308) | Other multiple gestation | 9 | |
| INPAT | INPAT_ICD10(O3002) | Twin pregnancy with a shared amniotic and chorionic sac | 8 | |
| INPAT | INPAT_ICD10(O309) | Multiple gestation, unspecified | 7 | |
| INPAT | INPAT_ICD10(O308) | Other multiple gestation | 6 | |
| PRIM_OUT | PRIM_OUT_NOT_USED_ICD10(O309) | Multiple gestation, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! | 5 |