Skip to main content

Table 2 The incidence of severe maternal morbidity using the four indicators

From: Comparison of global indicators for severe maternal morbidity among South Korean women who delivered from 2003 to 2018: a population-based retrospective cohort study

  US-CDC’s SMM Gold standard guideline for SMMa Zwart et al.’s SMM EURONET-SAMM
(n = 151,533) (n = 200,090) (n = 20,084) (n = 87,452)
N % N % N % N %
Acute myocardial infarction 645 0.4       
Aneurysm 66 0       
Acute renal failure 2310 1.5       
Adult respiratory distress syndrome 610 0.4       
Amniotic fluid embolism 233 0.2       
Cardiac arrest/ ventricular fibrillation 293 0.2       
Conversion of cardiac rhythm 744 0.5       
Disseminated intravascular coagulation 15,131 10       
Eclampsia 4912 3.2       
Heart failure/arrest during procedure or surgery 5 0       
Puerperal cerebrovascular disorders 1330 0.9       
Pulmonary edema/ acute heart failure 5283 3.5       
Severe anesthesia complications 140 0.1       
Sepsis 12,016 7.9       
Shock 7798 5.2       
Sickle cell anemia with crisis 5 0       
Air and thrombotic embolism 1821 1.2       
Blood product transfusion 117,076 77.3       
Hysterectomy 7251 4.8       
Temporary tracheostomy 84 0.1       
Ventilation 3233 2.1       
US-CDC’s SMM    151,533 75.7     
Prolonged postpartum length of stay*       
Maternal intensive care unit admission    10,188 5.1     
Administration of blood products (≥ 4 units)    636 0.3     
30 days readmission    50,265 25.1     
ICU admission      10,188 50.7   
Uterine rupture      637 3.2   
Eclampsia/HELLP syndrome      5406 26.9   
Major obstetric hemorrhage (≥ 4 units of blood cells; embolization or hysterectomy for MOH)      6837 34.0   
Miscellaneous (opinion of the treating obstetrician) *       
Eclampsia        7302 8.4
Septicemia during pregnancy or labor        15,672 17.9
Hysterectomy in the context of pregnancy        7251 8.3
Hysterectomy associated with obstetric hemorrhage        5839 6.7
Red blood cell transfusion associated with OH        63,213 72.3
  1. *Excluded in the indicators
  2. EURONET-SAMM European Network on Severe Acute Maternal Morbidity, GSG gold standard guidelines (American College of Obstetricians and Gynecologists) for SMM, HELLP hemolysis, elevated liver enzymes and low platelet syndrome, ICU intensive care unit, MOH major obstetric hemorrhage, OH obstetric hemorrhage, SMM severe maternal morbidity, US-CDC United States Centers for Disease Control and Prevention