for PC DOS at least 3.3, 640K RAM, 10 Mb free hard-disk space, in 3.5-in or 5.25-in high-density or low-density disks, or for Macintosh with 12 Mb free hard-disk space and system 4.2-7.X with 4Mb RAM, $595 individual (includes 100 hours category 1 CME credit), $295 resident discount (verification required); documentation: 46-pp manual in 3-ring binder; Eads, Tenn, Challenger Corp, 1993.
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As its name indicates, MD-Challenger is indeed a challenge. It is both a clinical reference, as the subtitle indicates, and a challenging testing tool.
Common concerns with software are ease of setup and ability to move around in the program. MD-Challenger is exceptionally easy to set up. It is also easy to run, if the operator takes a few minutes to read the short guide and tours the program through its tutorial. Essentially, MD-Challenger is easy to use.
The program itself is divided into chapters, each dealing with a specialty or subspecialty. The number of questions varies from chapter to chapter, from 23 in "Immunology, Allergy and Rheumatology" to 501 in the trauma chapter. It is possible to roam from chapter to chapter, although the editors recommend finishing one chapter before attempting the next.
One must identify oneself at the onset and provide a password. This allows scorekeeping. The scoring
van de Leuv JH. MD-Challenger: Clinical Reference and Educational Software for Acute Care and Emergency Medicine. JAMA. 1994;272(1):77. doi:10.1001/jama.1994.03520010095046