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USDA1995 Rural/Urban Continuum Codes for Metropolitan and Nonmetropolitan Counties* Code Metropolitan Counties 00 Central counties of metropolitan areas of ≥1 million population 01 Fringe counties of metropolitan areas of ≥1 million population 02 Counties in metropolitan areas of 250 000-1 000 000 population 03 Counties in metropolitan areas of <250 000 population Nonmetropolitan Counties 04 Urban population of a20 000, adjacent to a metropolitan area 05 Urban population of &20 000, not adjacent to a metropolitan area 06 Urban population of 2500-19 999, adjacent to a metropolitan area 07 Urban population of 2500-19999, not adjacent to a metropolitan area 08 Completly rural (no places with a population of >2500), adjacent to a metropolitan area 09 Copletely rural (no places with a population of ==2500), not adjacent to a metropolitan area
"Adapted from Kwakwa F Jonasson O. The general surgery work force.
Am J Surg. 1997;173:60. surgery in rural, not urban,
Trimble C. Invited Commentary: Spectrum of General Surgery in Rural America-Reply. Arch Surg. 1997;132(11):1239-1240. doi:10.1001/archsurg.1997.01430350089016