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. Author manuscript; available in PMC: 2017 Apr 28.
Published in final edited form as: JAMA Surg. 2017 Jan 1;152(1):11–18. doi: 10.1001/jamasurg.2016.3329

Table 1. Description of Urban and Rural Counties.

County, State 2010 Population, No.a Persons per Square Kilometer, No. EMS System Level I Hospitalb Level II Hospitalb Any Acute Care Hospitalb
Distance, km Driving Time Without/With Traffic, min Distance, km Driving Time Without/With Traffic, min Distance, km Driving Time Without/With Traffic, min
Urban
Multnomah, Oregon 735 334 655 Dual ALS response 9.2 16/26 NAc NAc 2.7 7/9
Washington, Oregon 529 710 281 Dual ALS response 17.2 24/45 NAc NAc 10.0 14/22
Clackamas, Oregon 375 992 77 Dual ALS response 24.3 26/40 NAc NAc 2.6 4/4
King, Washington 1 931 249 351 Tiered BLS-ALS response 14.2 18/26 NAc NAc 13.5 16/26
Clark, Washington 425 363 260 Dual ALS response 24.3 24/40 7.9 12/16 7.9d 12/16d
Rural
Josephine, Oregon 82 713 19 Dual response: BLS/ALS 398.8 230/270 230.6 140/170 5.1 6/6
Skamania, Washington 11 066 3 Single-agency ALS response 76.4 55/70 66.3 55/55 38.3 35/35

Abbreviations: ALS, advanced life support; BLS, basic life support; EMS, emergency medical services; NA, not applicable.

a

Population and geographic values based on 2010 US Census19 data for these regions.

b

Transport driving distances calculated for ground transport from the county-based centroid (geographic center based on population density using ArcGIS geospatial mapping) to each level of hospital; all distances rechecked using Google Maps from the same coordinates. Driving times were estimated using Google Maps for travel during typical times with light (11:30 pm) and with heavy (5 pm) traffic based on the ArcGIS coordinates.

c

Level I trauma center closer than the nearest level II trauma center.

d

Closest hospital is the level II trauma center.