title: Evaluating and Comparing Methods for Measuring Spatial Access to Mammography Centers in Appalachia (Re-Revised).
abstract: OBJECTIVE
  This study evaluated spatial access to mammography centers in Appalachia using both traditional access measures and the two-step floating catchment area (2SFCA) method.
  
  
  METHODS
  Ratios of county mammography centers to women age 45 and older, driving time to nearest mammography facility, and various 2SFCA approaches were compared throughout Pennsylvania, Ohio, Kentucky, and North Carolina.
  
  
  RESULTS
  Closest travel time measures favored urban areas. The 2SFCA method produced varied results depending on the parameters chosen. Appalachia areas had greater travel times to their closest mammography center. Appalachia areas in OH and NC had worse 2SFCA scores than non-Appalachia areas of the same states.
  
  
  CONCLUSIONS
  A relative 2SFCA approach, the spatial access ratio (SPAR) method, was recommended because it helped minimize the differences between various 2SFCA approaches.
authors.affiliation: Informatics and Special Projects Lead, Mountain Pacific Quality Health, Helena, MT, 59602.
authors.forename: Joseph
authors.initials: J
authors.lastname: Donohoe
authors.affiliation: College of Pharmacy, Michigan University of, Ann Arbor, MI, 48109, USA.
authors.forename: Vincent
authors.initials: V
authors.lastname: Marshall
authors.affiliation: Department of Pharmaceutical Systems and Policy, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA.
authors.forename: Xi
authors.initials: X
authors.lastname: Tan
authors.affiliation: Department of Public Health Sciences and Emily Couric Cancer Center, School of Medicine, University of Virginia, Hospital West, Jefferson Park Avenue, Charlottesville, VA 22901-0793.
authors.forename: Fabian T
authors.initials: FT
authors.lastname: Camacho
authors.affiliation: Department of Public Health Sciences and Emily Couric Cancer Center, School of Medicine, University of Virginia, Hospital West, Jefferson Park Avenue, Charlottesville, VA 22901-0793.
authors.forename: Roger
authors.initials: R
authors.lastname: Anderson
authors.affiliation: Department of Public Health Sciences and Emily Couric Cancer Center, School of Medicine, University of Virginia, Hospital West, Jefferson Park Avenue, Charlottesville, VA 22901-0793.
authors.forename: Rajesh
authors.initials: R
authors.lastname: Balkrishnan