Source Code Name Case count Share of cases (%)
OUTPAT OUTPAT_ICD10(O470) False labour before 37 completed weeks of gestation 8927
OUTPAT OUTPAT_ICD10(O342) Maternal care due to uterine scar from previous surgery 6734
INPAT INPAT_ICD10(O342) Maternal care due to uterine scar from previous surgery 5368
OUTPAT OUTPAT_ICD10(O321) Maternal care for breech presentation 4698
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! 4522
INPAT INPAT_ICD10(O470) False labour before 37 completed weeks of gestation 3692
OUTPAT OUTPAT_ICD10(O366) Maternal care for excessive fetal growth 3497
OUTPAT OUTPAT_ICD10(O429) Premature rupture of membranes, unspecified 3377
OUTPAT OUTPAT_ICD10(O471) False labour at or after 37 completed weeks of gestation 3265
INPAT INPAT_ICD10(O321) Maternal care for breech presentation 3043
OUTPAT OUTPAT_ICD10(O365) Maternal care for poor fetal growth 2649
INPAT INPAT_ICD10(O48) Prolonged pregnancy 2625
OUTPAT OUTPAT_ICD10(O48) Prolonged pregnancy 2623
INPAT INPAT_ICD10(O366) Maternal care for excessive fetal growth 2566
OUTPAT OUTPAT_ICD10(O351) Maternal care for (suspected) chromosomal abnormality in fetus 2514
OUTPAT OUTPAT_ICD10(O358) Maternal care for other (suspected) fetal abnormality and damage 1967
INPAT INPAT_ICD10(O365) Maternal care for poor fetal growth 1770
INPAT INPAT_ICD10(O429) Premature rupture of membranes, unspecified 1667
OUTPAT OUTPAT_ICD10(O410) Oligohydramnios 1619
OUTPAT OUTPAT_ICD10(O368) Maternal care for other specified fetal problems 1572
OUTPAT OUTPAT_ICD10(O469) Antepartum haemorrhage, unspecified 1531
OUTPAT OUTPAT_ICD10(O300) Twin pregnancy 1480
INPAT INPAT_ICD10(O471) False labour at or after 37 completed weeks of gestation 1471
OUTPAT OUTPAT_ICD10(O420) Premature rupture of membranes, onset of labour within 24 hours 1297
INPAT INPAT_ICD10(O410) Oligohydramnios 1268
INPAT INPAT_ICD10(O300) Twin pregnancy 1128
INPAT INPAT_ICD10(O421) Premature rupture of membranes, onset of labour after 24 hours 1022
INPAT INPAT_ICD10(O420) Premature rupture of membranes, onset of labour within 24 hours 971
OUTPAT OUTPAT_ICD10(O40) Polyhydramnios 953
OUTPAT OUTPAT_ICD10(O359) Maternal care for (suspected) fetal abnormality and damage, unspecified 906
OUTPAT OUTPAT_ICD10(O479) False labour, unspecified 888
INPAT INPAT_ICD10(O411) Infection of amniotic sac and membranes 871
INPAT INPAT_ICD10(O469) Antepartum haemorrhage, unspecified 831
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O47) False labour. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 794
OUTPAT OUTPAT_ICD10(O440) Placenta praevia specified as without haemorrhage 689
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O479) False labour, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 686
INPAT INPAT_ICD10(O358) Maternal care for other (suspected) fetal abnormality and damage 610
OUTPAT OUTPAT_ICD10(O369) Maternal care for fetal problem, unspecified 518
INPAT INPAT_ICD10(O369) Maternal care for fetal problem, unspecified 513
OUTPAT OUTPAT_ICD10(O322) Maternal care for transverse and oblique lie 512
INPAT INPAT_ICD10(O40) Polyhydramnios 480
OUTPAT OUTPAT_ICD10(O421) Premature rupture of membranes, onset of labour after 24 hours 411
OUTPAT OUTPAT_ICD10(O441) Placenta praevia with haemorrhage 402
INPAT INPAT_ICD10(O364) Maternal care for intrauterine death 389
INPAT INPAT_ICD10(O368) Maternal care for other specified fetal problems 379
OUTPAT OUTPAT_ICD10(O343) Maternal care for cervical incompetence 373
OUTPAT OUTPAT_ICD10(O341) Maternal care for tumour of corpus uteri 364
INPAT INPAT_ICD10(O441) Placenta praevia with haemorrhage 363
INPAT INPAT_ICD10(O479) False labour, unspecified 343
OUTPAT OUTPAT_ICD10(O3000) Twin pregnancy with separate amniotic and chorionic sacs 332
OUTPAT OUTPAT_ICD10(O363) Maternal care for signs of fetal hypoxia 325
OUTPAT OUTPAT_ICD10(O364) Maternal care for intrauterine death 321
OUTPAT OUTPAT_ICD10(O320) Maternal care for unstable lie 300
INPAT INPAT_ICD10(O343) Maternal care for cervical incompetence 277
INPAT INPAT_ICD10(O440) Placenta praevia specified as without haemorrhage 268
INPAT INPAT_ICD10(O363) Maternal care for signs of fetal hypoxia 265
INPAT INPAT_ICD10(O3000) Twin pregnancy with separate amniotic and chorionic sacs 257
OUTPAT OUTPAT_ICD10(O419) Disorder of amniotic fluid and membranes, unspecified 247
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O321) Maternal care for breech presentation. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 247
INPAT INPAT_ICD10(O459) Premature separation of placenta, unspecified 238
OUTPAT OUTPAT_ICD10(O352) Maternal care for (suspected) hereditary disease in fetus 229
OUTPAT OUTPAT_ICD10(O468) Other antepartum haemorrhage 219
OUTPAT OUTPAT_ICD10(O418) Other specified disorders of amniotic fluid and membranes 214
OUTPAT OUTPAT_ICD10(O340) Maternal care for congenital malformation of uterus 207
INPAT INPAT_ICD10(O333) Maternal care for disproportion due to outlet contraction of pelvis 203
OUTPAT OUTPAT_ICD10(O339) Maternal care for disproportion, unspecified 203
INPAT INPAT_ICD10(O322) Maternal care for transverse and oblique lie 198
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O300) Twin pregnancy. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 189
INPAT INPAT_ICD10(O341) Maternal care for tumour of corpus uteri 183
INPAT INPAT_ICD10(O351) Maternal care for (suspected) chromosomal abnormality in fetus 170
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! 169
OUTPAT OUTPAT_ICD10(O335) Maternal care for disproportion due to unusually large fetus 158
OUTPAT OUTPAT_ICD10(O348) Maternal care for other abnormalities of pelvic organs 154
INPAT INPAT_ICD10(O339) Maternal care for disproportion, unspecified 152
INPAT INPAT_ICD10(O335) Maternal care for disproportion due to unusually large fetus 149
OUTPAT OUTPAT_ICD10(O355) Maternal care for (suspected) damage to fetus by drugs 147
INPAT INPAT_ICD10(O331) Maternal care for disproportion due to generally contracted pelvis 146
INPAT INPAT_ICD10(O320) Maternal care for unstable lie 145
INPAT INPAT_ICD10(O359) Maternal care for (suspected) fetal abnormality and damage, unspecified 144
INPAT INPAT_ICD10(O340) Maternal care for congenital malformation of uterus 131
INPAT INPAT_ICD10(O334) Maternal care for disproportion of mixed maternal and fetal origin 128
INPAT INPAT_ICD10(O458) Other premature separation of placenta 127
OUTPAT OUTPAT_ICD10(O360) Maternal care for rhesus isoimmunization 127
OUTPAT OUTPAT_ICD10(O344) Maternal care for other abnormalities of cervix 123
OUTPAT OUTPAT_ICD10(O333) Maternal care for disproportion due to outlet contraction of pelvis 118
INPAT INPAT_ICD10(O418) Other specified disorders of amniotic fluid and membranes 117
OUTPAT OUTPAT_ICD10(O350) Maternal care for (suspected) central nervous system malformation in fetus 117
INPAT INPAT_ICD10(O468) Other antepartum haemorrhage 108
INPAT INPAT_ICD10(O332) Maternal care for disproportion due to inlet contraction of pelvis 104
OUTPAT OUTPAT_ICD10(O3001) Twin pregnancy with a shared chorionic sac and a separate amniotic sac 102
INPAT INPAT_ICD10(O360) Maternal care for rhesus isoimmunization 99
INPAT INPAT_ICD10(O422) Premature rupture of membranes, labour delayed by therapy 97
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O366) Maternal care for excessive fetal growth. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 91
OUTPAT OUTPAT_ICD10(O331) Maternal care for disproportion due to generally contracted pelvis 89
OUTPAT OUTPAT_ICD10(O354) Maternal care for (suspected) damage to fetus from alcohol 85
OUTPAT OUTPAT_ICD10(O411) Infection of amniotic sac and membranes 85
INPAT INPAT_ICD10(O355) Maternal care for (suspected) damage to fetus by drugs 75
INPAT INPAT_ICD10(O328) Maternal care for other malpresentation of fetus 74
OUTPAT OUTPAT_ICD10(O349) Maternal care for abnormality of pelvic organ, unspecified 74
INPAT INPAT_ICD10(O3001) Twin pregnancy with a shared chorionic sac and a separate amniotic sac 73
OUTPAT OUTPAT_ICD10(O332) Maternal care for disproportion due to inlet contraction of pelvis 70
OUTPAT OUTPAT_ICD10(O422) Premature rupture of membranes, labour delayed by therapy 70
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! 69
INPAT INPAT_ICD10(O347) Maternal care for abnormality of vulva and perineum 66
OUTPAT OUTPAT_ICD10(O361) Maternal care for other isoimmunization 63
OUTPAT OUTPAT_ICD10(O347) Maternal care for abnormality of vulva and perineum 62
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O365) Maternal care for poor fetal growth. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 61
INPAT INPAT_ICD10(O419) Disorder of amniotic fluid and membranes, unspecified 59
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! 59
INPAT INPAT_ICD10(O344) Maternal care for other abnormalities of cervix 56
INPAT INPAT_ICD10(O348) Maternal care for other abnormalities of pelvic organs 53
INPAT INPAT_ICD10(O438) Other placental disorders 53
OUTPAT OUTPAT_ICD10(O301) Triplet pregnancy 50
OUTPAT OUTPAT_ICD10(O438) Other placental disorders 49
INPAT INPAT_ICD10(O350) Maternal care for (suspected) central nervous system malformation in fetus 47
OUTPAT OUTPAT_ICD10(O328) Maternal care for other malpresentation of fetus 47
INPAT INPAT_ICD10(O330) Maternal care for disproportion due to deformity of maternal pelvic bones 46
OUTPAT OUTPAT_ICD10(O459) Premature separation of placenta, unspecified 46
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O469) Antepartum haemorrhage, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 46
INPAT INPAT_ICD10(O361) Maternal care for other isoimmunization 41
OUTPAT OUTPAT_ICD10(O334) Maternal care for disproportion of mixed maternal and fetal origin 41
OUTPAT OUTPAT_ICD10(O312) Continuing pregnancy after intrauterine death of one fetus or more 38
INPAT INPAT_ICD10(O354) Maternal care for (suspected) damage to fetus from alcohol 36
OUTPAT OUTPAT_ICD10(O362) Maternal care for hydrops fetalis 36
OUTPAT OUTPAT_ICD10(O47) False labour 36
INPAT INPAT_ICD10(O352) Maternal care for (suspected) hereditary disease in fetus 35
OUTPAT OUTPAT_ICD10(O324) Maternal care for high head at term 35
INPAT INPAT_ICD10(O460) Antepartum haemorrhage with coagulation defect 34
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! 34
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! 33
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O440) Placenta praevia specified as without haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 33
INPAT INPAT_ICD10(O301) Triplet pregnancy 31
INPAT INPAT_ICD10(O450) Premature separation of placenta with coagulation defect 31
INPAT INPAT_ICD10(O430) Placental transfusion syndromes 29
OUTPAT OUTPAT_ICD10(O329) Maternal care for malpresentation of fetus, unspecified 29
INPAT INPAT_ICD10(O324) Maternal care for high head at term 28
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O40) Polyhydramnios. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 28
OUTPAT OUTPAT_ICD10(O309) Multiple gestation, unspecified 26
OUTPAT OUTPAT_ICD10(O439) Placental disorder, unspecified 26
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! 26
OUTPAT OUTPAT_ICD10(O330) Maternal care for disproportion due to deformity of maternal pelvic bones 23
OUTPAT OUTPAT_ICD10(O458) Other premature separation of placenta 23
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! 23
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! 23
OUTPAT OUTPAT_ICD10(O345) Maternal care for other abnormalities of gravid uterus 22
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O410) Oligohydramnios. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 22
INPAT INPAT_ICD10(O338) Maternal care for disproportion of other origin 21
INPAT INPAT_ICD10(O349) Maternal care for abnormality of pelvic organ, unspecified 20
OUTPAT OUTPAT_ICD10(O318) Other complications specific to multiple gestation 20
OUTPAT OUTPAT_ICD10(O430) Placental transfusion syndromes 20
INPAT INPAT_ICD10(O323) Maternal care for face, brow and chin presentation 19
OUTPAT OUTPAT_ICD10(O311) Continuing pregnancy after abortion of one fetus or more 19
INPAT INPAT_ICD10(O346) Maternal care for abnormality of vagina 17
INPAT INPAT_ICD10(O362) Maternal care for hydrops fetalis 17
INPAT INPAT_ICD10(O432) Morbidly adherent placenta 17
OUTPAT OUTPAT_ICD10(O460) Antepartum haemorrhage with coagulation defect 17
INPAT INPAT_ICD10(O312) Continuing pregnancy after intrauterine death of one fetus or more 16
INPAT INPAT_ICD10(O318) Other complications specific to multiple gestation 16
INPAT INPAT_ICD10(O325) Maternal care for multiple gestation with malpresentation of one fetus or more 16
OUTPAT OUTPAT_ICD10(O346) Maternal care for abnormality of vagina 16
OUTPAT OUTPAT_ICD10(O356) Maternal care for (suspected) damage to fetus by radiation 16
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O441) Placenta praevia with haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 16
INPAT INPAT_ICD10(O439) Placental disorder, unspecified 15
OUTPAT OUTPAT_ICD10(O432) Morbidly adherent placenta 15
OUTPAT OUTPAT_ICD10(O3002) Twin pregnancy with a shared amniotic and chorionic sac 13
OUTPAT OUTPAT_ICD10(O325) Maternal care for multiple gestation with malpresentation of one fetus or more 13
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O429) Premature rupture of membranes, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 13
INPAT INPAT_ICD10(O329) Maternal care for malpresentation of fetus, unspecified 12
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O343) Maternal care for cervical incompetence. 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
INPAT INPAT_ICD10(O311) Continuing pregnancy after abortion of one fetus or more 11
OUTPAT OUTPAT_ICD10(O353) Maternal care for (suspected) damage to fetus from viral disease in mother 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(O326) Maternal care for compound presentation 8
OUTPAT OUTPAT_ICD10(O367) Maternal care for viable fetus in abdominal pregnancy 8
OUTPAT OUTPAT_ICD10(O431) Malformation of placenta 8
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! 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(O44) Placenta praevia. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 8
INPAT INPAT_ICD10(O309) Multiple gestation, unspecified 7
INPAT INPAT_ICD10(O431) Malformation of placenta 7
OUTPAT OUTPAT_ICD10(O310) Papyraceous fetus 7
OUTPAT OUTPAT_ICD10(O357) Maternal care for (suspected) damage to fetus by other medical procedures 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(O468) Other antepartum haemorrhage. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 7
INPAT INPAT_ICD10(O3002) Twin pregnancy with a shared amniotic and chorionic sac 6
INPAT INPAT_ICD10(O345) Maternal care for other abnormalities of gravid uterus 6
OUTPAT OUTPAT_ICD10(O30) Multiple gestation 6
OUTPAT OUTPAT_ICD10(O323) Maternal care for face, brow and chin presentation 6
OUTPAT OUTPAT_ICD10(O338) Maternal care for disproportion of other origin 6
OUTPAT OUTPAT_ICD10(O42) Premature rupture of membranes 6
OUTPAT OUTPAT_ICD10(O308) Other multiple gestation 5
PRIM_OUT PRIM_OUT_NOT_USED_ICD10(O459) Premature separation of placenta, unspecified. Not used in endpoint definition. POSSIBLY INACCURATE IN COMPLEX ENDPOINTS! 5