Frequency and severity of prehospital obstetric events encountered by emergency medical services in the United States

Table 2 Primary impression^a documented by treating provider for EMS emergency activations for an obstetric event (n=107,771)

Category	Emergency Obstetric Activations, n (%)
Abdominal pain and other digestive/abdomen signs and symptoms	18,222 (18)
Other specified complications in pregnancy	15,350 (15)
Malposition, disproportion or other labor complications	13,743 (13)
Uncomplicated pregnancy, delivery or puerperium	12,336 (12)
Other specified female genital disorders	9,582 (9)
Early or threatened labor	6,869 (7)
Complications specified during childbirth	6,003 (6)
Spontaneous abortion and complications	2,689 (3)
Malaise and fatigue	1,506 (1)
Nervous system pain and pain syndromes	1,354 (1)
Nausea and vomiting	1,118 (1)
Other obstetric conditions	2,276 (2)
Other non-obstetric conditions^b	12,235 (12)

Note: Percentages may not total to 100% due to rounding
Abbreviations: EMS, emergency medical services
^aPrimary impression (eSituation.11) grouped by the Agency for Healthcare Research and Quality Clinical Classifications Software Refined (CCSR) for International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) Diagnoses version 2020.3 categories [18]. Default CCSR categories were used except for “Z37” codes (classified instead as maternal outcome of delivery)
^bOther includes 143 categories under 1% each

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