Explores a potential indicator of EMS availability, the
Expected Annual Emergency Miles per Ambulance (EXAMB).
The ambulance is used as the core unit of availability
due to its importance for safe transport and the
initiation of medical services. The EXAMB measure
calculates expected annual emergency miles per ambulance
beginning with the number of ambulances, the land area of
a county as a proxy for distance, and county population.
Findings showed that in three of the five states studied,
EXAMB values varied in parallel with other measures of
resource availability, and in all states, the EXAMB was
positively related to the proportion of the county
population in poverty.