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QuickStats: Percentage of Weekly Visits to Emergency Departments
for Illness and Injury by Patients Arriving via Ambulance,* by Day/Night
Period of Arrival --- United States, 2003--2004
* Air, ground, private, or public ambulances, including fire and rescue vehicles.
† Day is 3:00 a.m. to 5:59 p.m., and night is 6:00 p.m. to 2:59 a.m.
Percentages indicate the proportion of weekly visits for illness or injury distributed over 14 periods (day
and night). Overall, persons who arrive by ambulance at an emergency department (ED) are more likely to do
so because of illness (57%) than injury (43%). However, on Saturdays, ambulances are more likely to
bring persons with injuries than illnesses, both during the day and at night. Ambulance-transported
patients account for approximately 15% of all ED visits and 16 million patients annually.
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