Trends in adverse maternal outcomes during childbirth: a population-based study of severe maternal morbidity

Table 1 Frequency of diagnoses and procedures contributing to the maternal morbidity outcome indicator (MMOI) during the birth admission 1999–2004

Indicators of severe maternal morbidity	Frequency*	Rate/10 000
Morbid events/diagnoses†	1340
Shock	321	6.41
Uterine rupture	265	5.29
Cardiac failure	225	4.49
Obstetric embolism	194	3.88
Acute renal failure	105	2.10
Major complication of anaesthesia	95	1.90
Psychosis	29	0.58
Status asthmaticus	21	0.42
Status epilepticus	19	0.38
Acute appendicitis	18	0.36
Cerebrovascular accident	16	0.32
Procedures indicating morbidity†	6320
Any transfusion‡	4710	94.1
Blood transfusion	4552	90.9
Transfusion of other blood products	612	12.4
Procedures to control bleeding
Evacuation haematoma	306	6.11
Hysterectomy	156	3.12
Dilatation and curettage with GA	155	3.10
Embolisation or ligation of blood vessels	40	0.80
Other interventions to control post-operative bleeding	48	0.96
Other procedures
Assisted ventilation	132	2.64
Repair bladder	113	2.26
Repair ruptured uterus	66	1.32
Cystostomy	64	1.28
Reclose disrupted CS wound	24	0.48
Repair small or large intestine	18	0.36
Dialysis	17	0.34

*women can have more than one diagnosis and/or procedure.
† Total includes diagnoses and procedures with ≤ 10 events including, myocardial infarction, cerebral oedema, peritonitis, disseminated intravascular coagulopathy, sickle cell anaemia with crisis and repair of inverted uterus.
‡ Includes transfusion of blood or blood products (eg platelets, coagulation factors).
GA = general anaesthesia

ISSN: 1471-2393