Source Code Name Case count Share of cases (%)
OUTPAT OUTPAT_ICD10(O470) False labour before 37 completed weeks of gestation 10176
OUTPAT OUTPAT_ICD10(O342) Maternal care due to uterine scar from previous surgery 7639
INPAT INPAT_ICD10(O342) Maternal care due to uterine scar from previous surgery 6071
OUTPAT OUTPAT_ICD10(O321) Maternal care for breech presentation 5334
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O470) False labour before 37 completed weeks of gestation. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 5182
INPAT INPAT_ICD10(O470) False labour before 37 completed weeks of gestation 4238
OUTPAT OUTPAT_ICD10(O366) Maternal care for excessive fetal growth 4016
OUTPAT OUTPAT_ICD10(O429) Premature rupture of membranes, unspecified 3895
OUTPAT OUTPAT_ICD10(O471) False labour at or after 37 completed weeks of gestation 3766
INPAT INPAT_ICD10(O321) Maternal care for breech presentation 3455
OUTPAT OUTPAT_ICD10(O48) Prolonged pregnancy 3064
OUTPAT OUTPAT_ICD10(O365) Maternal care for poor fetal growth 3040
INPAT INPAT_ICD10(O48) Prolonged pregnancy 2952
INPAT INPAT_ICD10(O366) Maternal care for excessive fetal growth 2923
OUTPAT OUTPAT_ICD10(O351) Maternal care for (suspected) chromosomal abnormality in fetus 2757
OUTPAT OUTPAT_ICD10(O358) Maternal care for other (suspected) fetal abnormality and damage 2212
INPAT INPAT_ICD10(O365) Maternal care for poor fetal growth 2002
INPAT INPAT_ICD10(O429) Premature rupture of membranes, unspecified 1915
OUTPAT OUTPAT_ICD10(O410) Oligohydramnios 1879
OUTPAT OUTPAT_ICD10(O368) Maternal care for other specified fetal problems 1764
OUTPAT OUTPAT_ICD10(O469) Antepartum haemorrhage, unspecified 1762
OUTPAT OUTPAT_ICD10(O300) Twin pregnancy 1720
INPAT INPAT_ICD10(O471) False labour at or after 37 completed weeks of gestation 1716
INPAT INPAT_ICD10(O410) Oligohydramnios 1458
OUTPAT OUTPAT_ICD10(O420) Premature rupture of membranes, onset of labour within 24 hours 1446
INPAT INPAT_ICD10(O300) Twin pregnancy 1289
INPAT INPAT_ICD10(O421) Premature rupture of membranes, onset of labour after 24 hours 1147
OUTPAT OUTPAT_ICD10(O40) Polyhydramnios 1102
INPAT INPAT_ICD10(O420) Premature rupture of membranes, onset of labour within 24 hours 1081
OUTPAT OUTPAT_ICD10(O359) Maternal care for (suspected) fetal abnormality and damage, unspecified 1039
OUTPAT OUTPAT_ICD10(O479) False labour, unspecified 1013
INPAT INPAT_ICD10(O411) Infection of amniotic sac and membranes 1003
INPAT INPAT_ICD10(O469) Antepartum haemorrhage, unspecified 946
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O47) False labour. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 914
OUTPAT OUTPAT_ICD10(O440) Placenta praevia specified as without haemorrhage 792
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O479) False labour, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 787
INPAT INPAT_ICD10(O358) Maternal care for other (suspected) fetal abnormality and damage 676
OUTPAT OUTPAT_ICD10(O322) Maternal care for transverse and oblique lie 583
OUTPAT OUTPAT_ICD10(O369) Maternal care for fetal problem, unspecified 578
INPAT INPAT_ICD10(O40) Polyhydramnios 558
INPAT INPAT_ICD10(O369) Maternal care for fetal problem, unspecified 545
OUTPAT OUTPAT_ICD10(O421) Premature rupture of membranes, onset of labour after 24 hours 470
OUTPAT OUTPAT_ICD10(O441) Placenta praevia with haemorrhage 461
INPAT INPAT_ICD10(O364) Maternal care for intrauterine death 437
OUTPAT OUTPAT_ICD10(O343) Maternal care for cervical incompetence 434
INPAT INPAT_ICD10(O368) Maternal care for other specified fetal problems 424
INPAT INPAT_ICD10(O441) Placenta praevia with haemorrhage 421
OUTPAT OUTPAT_ICD10(O341) Maternal care for tumour of corpus uteri 397
OUTPAT OUTPAT_ICD10(O3000) Twin pregnancy with separate amniotic and chorionic sacs 395
INPAT INPAT_ICD10(O479) False labour, unspecified 384
OUTPAT OUTPAT_ICD10(O364) Maternal care for intrauterine death 366
OUTPAT OUTPAT_ICD10(O363) Maternal care for signs of fetal hypoxia 354
OUTPAT OUTPAT_ICD10(O320) Maternal care for unstable lie 335
INPAT INPAT_ICD10(O343) Maternal care for cervical incompetence 312
INPAT INPAT_ICD10(O440) Placenta praevia specified as without haemorrhage 309
INPAT INPAT_ICD10(O3000) Twin pregnancy with separate amniotic and chorionic sacs 303
INPAT INPAT_ICD10(O363) Maternal care for signs of fetal hypoxia 292
OUTPAT OUTPAT_ICD10(O419) Disorder of amniotic fluid and membranes, unspecified 273
INPAT INPAT_ICD10(O459) Premature separation of placenta, unspecified 271
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O321) Maternal care for breech presentation. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 263
OUTPAT OUTPAT_ICD10(O418) Other specified disorders of amniotic fluid and membranes 259
OUTPAT OUTPAT_ICD10(O352) Maternal care for (suspected) hereditary disease in fetus 256
OUTPAT OUTPAT_ICD10(O468) Other antepartum haemorrhage 255
OUTPAT OUTPAT_ICD10(O339) Maternal care for disproportion, unspecified 233
INPAT INPAT_ICD10(O322) Maternal care for transverse and oblique lie 232
OUTPAT OUTPAT_ICD10(O340) Maternal care for congenital malformation of uterus 232
INPAT INPAT_ICD10(O333) Maternal care for disproportion due to outlet contraction of pelvis 229
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O300) Twin pregnancy. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 223
INPAT INPAT_ICD10(O341) Maternal care for tumour of corpus uteri 203
INPAT INPAT_ICD10(O351) Maternal care for (suspected) chromosomal abnormality in fetus 195
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O342) Maternal care due to uterine scar from previous surgery. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 193
OUTPAT OUTPAT_ICD10(O335) Maternal care for disproportion due to unusually large fetus 180
INPAT INPAT_ICD10(O335) Maternal care for disproportion due to unusually large fetus 173
OUTPAT OUTPAT_ICD10(O348) Maternal care for other abnormalities of pelvic organs 167
OUTPAT OUTPAT_ICD10(O355) Maternal care for (suspected) damage to fetus by drugs 166
INPAT INPAT_ICD10(O320) Maternal care for unstable lie 165
INPAT INPAT_ICD10(O339) Maternal care for disproportion, unspecified 164
INPAT INPAT_ICD10(O331) Maternal care for disproportion due to generally contracted pelvis 162
INPAT INPAT_ICD10(O359) Maternal care for (suspected) fetal abnormality and damage, unspecified 159
OUTPAT OUTPAT_ICD10(O360) Maternal care for rhesus isoimmunization 153
INPAT INPAT_ICD10(O334) Maternal care for disproportion of mixed maternal and fetal origin 146
INPAT INPAT_ICD10(O340) Maternal care for congenital malformation of uterus 141
INPAT INPAT_ICD10(O418) Other specified disorders of amniotic fluid and membranes 140
OUTPAT OUTPAT_ICD10(O344) Maternal care for other abnormalities of cervix 137
INPAT INPAT_ICD10(O458) Other premature separation of placenta 136
OUTPAT OUTPAT_ICD10(O333) Maternal care for disproportion due to outlet contraction of pelvis 132
OUTPAT OUTPAT_ICD10(O350) Maternal care for (suspected) central nervous system malformation in fetus 132
OUTPAT OUTPAT_ICD10(O3001) Twin pregnancy with a shared chorionic sac and a separate amniotic sac 131
INPAT INPAT_ICD10(O468) Other antepartum haemorrhage 128
INPAT INPAT_ICD10(O360) Maternal care for rhesus isoimmunization 121
INPAT INPAT_ICD10(O332) Maternal care for disproportion due to inlet contraction of pelvis 115
INPAT INPAT_ICD10(O422) Premature rupture of membranes, labour delayed by therapy 107
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O366) Maternal care for excessive fetal growth. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 105
OUTPAT OUTPAT_ICD10(O411) Infection of amniotic sac and membranes 98
OUTPAT OUTPAT_ICD10(O331) Maternal care for disproportion due to generally contracted pelvis 97
OUTPAT OUTPAT_ICD10(O354) Maternal care for (suspected) damage to fetus from alcohol 91
INPAT INPAT_ICD10(O3001) Twin pregnancy with a shared chorionic sac and a separate amniotic sac 89
OUTPAT OUTPAT_ICD10(O349) Maternal care for abnormality of pelvic organ, unspecified 89
INPAT INPAT_ICD10(O328) Maternal care for other malpresentation of fetus 86
OUTPAT OUTPAT_ICD10(O422) Premature rupture of membranes, labour delayed by therapy 83
INPAT INPAT_ICD10(O355) Maternal care for (suspected) damage to fetus by drugs 79
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O471) False labour at or after 37 completed weeks of gestation. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 79
OUTPAT OUTPAT_ICD10(O332) Maternal care for disproportion due to inlet contraction of pelvis 76
OUTPAT OUTPAT_ICD10(O361) Maternal care for other isoimmunization 74
INPAT INPAT_ICD10(O347) Maternal care for abnormality of vulva and perineum 70
OUTPAT OUTPAT_ICD10(O347) Maternal care for abnormality of vulva and perineum 68
INPAT INPAT_ICD10(O344) Maternal care for other abnormalities of cervix 66
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O365) Maternal care for poor fetal growth. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 65
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O358) Maternal care for other (suspected) fetal abnormality and damage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 64
INPAT INPAT_ICD10(O419) Disorder of amniotic fluid and membranes, unspecified 62
INPAT INPAT_ICD10(O348) Maternal care for other abnormalities of pelvic organs 61
INPAT INPAT_ICD10(O438) Other placental disorders 57
INPAT INPAT_ICD10(O330) Maternal care for disproportion due to deformity of maternal pelvic bones 56
OUTPAT OUTPAT_ICD10(O301) Triplet pregnancy 56
OUTPAT OUTPAT_ICD10(O328) Maternal care for other malpresentation of fetus 54
OUTPAT OUTPAT_ICD10(O459) Premature separation of placenta, unspecified 54
INPAT INPAT_ICD10(O350) Maternal care for (suspected) central nervous system malformation in fetus 53
OUTPAT OUTPAT_ICD10(O438) Other placental disorders 53
INPAT INPAT_ICD10(O361) Maternal care for other isoimmunization 50
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O469) Antepartum haemorrhage, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 49
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(O47) False labour 46
OUTPAT OUTPAT_ICD10(O324) Maternal care for high head at term 45
OUTPAT OUTPAT_ICD10(O334) Maternal care for disproportion of mixed maternal and fetal origin 45
OUTPAT OUTPAT_ICD10(O312) Continuing pregnancy after intrauterine death of one fetus or more 44
OUTPAT OUTPAT_ICD10(O362) Maternal care for hydrops fetalis 41
INPAT INPAT_ICD10(O450) Premature separation of placenta with coagulation defect 40
INPAT INPAT_ICD10(O352) Maternal care for (suspected) hereditary disease in fetus 39
INPAT INPAT_ICD10(O354) Maternal care for (suspected) damage to fetus from alcohol 39
INPAT INPAT_ICD10(O460) Antepartum haemorrhage with coagulation defect 38
INPAT INPAT_ICD10(O301) Triplet pregnancy 35
INPAT INPAT_ICD10(O430) Placental transfusion syndromes 34
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O440) Placenta praevia specified as without haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 34
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O40) Polyhydramnios. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 33
OUTPAT OUTPAT_ICD10(O309) Multiple gestation, unspecified 31
OUTPAT OUTPAT_ICD10(O329) Maternal care for malpresentation of fetus, unspecified 31
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O322) Maternal care for transverse and oblique lie. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 31
INPAT INPAT_ICD10(O324) Maternal care for high head at term 30
OUTPAT OUTPAT_ICD10(O439) Placental disorder, unspecified 30
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O36) Maternal care for other known or suspected fetal problems. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 28
OUTPAT OUTPAT_ICD10(O430) Placental transfusion syndromes 26
INPAT INPAT_ICD10(O338) Maternal care for disproportion of other origin 25
OUTPAT OUTPAT_ICD10(O330) Maternal care for disproportion due to deformity of maternal pelvic bones 25
OUTPAT OUTPAT_ICD10(O458) Other premature separation of placenta 25
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O32) Maternal care for known or suspected malpresentation of fetus. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 25
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O368) Maternal care for other specified fetal problems. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 25
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O410) Oligohydramnios. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 25
OUTPAT OUTPAT_ICD10(O311) Continuing pregnancy after abortion of one fetus or more 24
OUTPAT OUTPAT_ICD10(O318) Other complications specific to multiple gestation 24
INPAT INPAT_ICD10(O323) Maternal care for face, brow and chin presentation 23
INPAT INPAT_ICD10(O349) Maternal care for abnormality of pelvic organ, unspecified 23
OUTPAT OUTPAT_ICD10(O345) Maternal care for other abnormalities of gravid uterus 23
INPAT INPAT_ICD10(O312) Continuing pregnancy after intrauterine death of one fetus or more 21
INPAT INPAT_ICD10(O325) Maternal care for multiple gestation with malpresentation of one fetus or more 21
OUTPAT OUTPAT_ICD10(O460) Antepartum haemorrhage with coagulation defect 21
INPAT INPAT_ICD10(O432) Morbidly adherent placenta 20
INPAT INPAT_ICD10(O362) Maternal care for hydrops fetalis 19
OUTPAT OUTPAT_ICD10(O432) Morbidly adherent placenta 19
INPAT INPAT_ICD10(O439) Placental disorder, unspecified 18
OUTPAT OUTPAT_ICD10(O346) Maternal care for abnormality of vagina 18
OUTPAT OUTPAT_ICD10(O356) Maternal care for (suspected) damage to fetus by radiation 18
INPAT INPAT_ICD10(O318) Other complications specific to multiple gestation 17
INPAT INPAT_ICD10(O346) Maternal care for abnormality of vagina 17
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O343) Maternal care for cervical incompetence. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 16
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O441) Placenta praevia with haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 16
OUTPAT OUTPAT_ICD10(O325) Maternal care for multiple gestation with malpresentation of one fetus or more 15
OUTPAT OUTPAT_ICD10(O3002) Twin pregnancy with a shared amniotic and chorionic sac 14
INPAT INPAT_ICD10(O311) Continuing pregnancy after abortion of one fetus or more 12
INPAT INPAT_ICD10(O329) Maternal care for malpresentation of fetus, unspecified 12
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O429) Premature rupture of membranes, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 12
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O48) Prolonged pregnancy. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 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! 11
OUTPAT OUTPAT_ICD10(O353) Maternal care for (suspected) damage to fetus from viral disease in mother 10
OUTPAT OUTPAT_ICD10(O431) Malformation of placenta 10
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O44) Placenta praevia. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 10
OUTPAT OUTPAT_ICD10(O326) Maternal care for compound presentation 9
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O320) Maternal care for unstable lie. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 9
OUTPAT OUTPAT_ICD10(O302) Quadruplet pregnancy 8
OUTPAT OUTPAT_ICD10(O308) Other multiple gestation 8
OUTPAT OUTPAT_ICD10(O310) Papyraceous fetus 8
OUTPAT OUTPAT_ICD10(O367) Maternal care for viable fetus in abdominal pregnancy 8
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O341) Maternal care for tumour of corpus uteri. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 8
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O468) Other antepartum haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 8
INPAT INPAT_ICD10(O3002) Twin pregnancy with a shared amniotic and chorionic sac 7
INPAT INPAT_ICD10(O309) Multiple gestation, unspecified 7
INPAT INPAT_ICD10(O345) Maternal care for other abnormalities of gravid uterus 7
INPAT INPAT_ICD10(O356) Maternal care for (suspected) damage to fetus by radiation 7
INPAT INPAT_ICD10(O431) Malformation of placenta 7
OUTPAT OUTPAT_ICD10(O30) Multiple gestation 7
OUTPAT OUTPAT_ICD10(O323) Maternal care for face, brow and chin presentation 7
OUTPAT OUTPAT_ICD10(O338) Maternal care for disproportion of other origin 7
OUTPAT OUTPAT_ICD10(O357) Maternal care for (suspected) damage to fetus by other medical procedures 7
OUTPAT OUTPAT_ICD10(O42) Premature rupture of membranes 7
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O344) Maternal care for other abnormalities of cervix. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 7
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O364) Maternal care for intrauterine death. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 6
OUTPAT OUTPAT_ICD10(O337) Maternal care for disproportion due to other fetal deformities 5
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O350) Maternal care for (suspected) central nervous system malformation in fetus. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 5
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O355) Maternal care for (suspected) damage to fetus by drugs. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 5