title: Self-referred whole-body CT imaging: current implications for health care consumers.
abstract: OBJECTIVE
  To conduct an empirical analysis of self-referred whole-body computed tomography (CT) and develop a profile of the geographic and demographic distribution of centers, types of services and modalities, costs, and procedures for reporting results.
  
  
  METHODS
  An analysis was conducted of Web sites for imaging centers accepting self-referred patients identified by two widely used Internet search engines with large indexes. These Web sites were analyzed for geographic location, type of screening center, services, costs, and procedures for managing imaging results. Demographic data were extrapolated for analysis on the basis of center location. Descriptive statistics, such as frequencies, means, SDs, ranges, and CIs, were generated to describe the characteristics of the samples. Data were compared with national norms by using a distribution-free method for calculating a 95% CI (P <.05) for the median.
  
  
  RESULTS
  Eighty-eight centers identified with the search methods were widely distributed across the United States, with a concentration on both coasts. Demographic analysis further situated them in areas of the country characterized by a population that consisted largely of European Americans (P <.05) and individuals of higher education (P <.05) and socioeconomic status (P <.05). Forty-seven centers offered whole-body screening; heart and lung examinations were most frequently offered. Procedures for reporting results were highly variable.
  
  
  CONCLUSIONS
  The geographic distribution of the centers suggests target populations of educated health-conscious consumers who can assume high out-of-pocket costs. Guidelines developed from within the profession and further research are needed to ensure that benefits of these services outweigh risks to individuals and the health care system.
authors.affiliation: Department of Medicine, Stanford University Medical Center, 701 Welch Rd, Stanford, CA 94304-5748, USA. illes@stanford.edu
authors.forename: Judy
authors.initials: J
authors.lastname: Illes
authors.forename: Ellen
authors.initials: E
authors.lastname: Fan
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Koenig
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Raffin
authors.forename: Dylan
authors.initials: D
authors.lastname: Kann
authors.forename: Scott W
authors.initials: SW
authors.lastname: Atlas
mesh_terms: D006801:Humans; D020407:Internet; D008389:Marketing of Health Services; D012017:Referral and Consultation; D012648:Self Care; D014057:Tomography, X-Ray Computed / Q000191:economics; D014481:United States