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Letters |15 September 1994

Analyzing Computer-based Decision Support Systems

R. Brian Haynes

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  • McMaster University, London, Ontario, Canada L8N 375
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McDonald and colleagues raise important points. First, the weight we gave to the unit of randomization was based on concerns about contamination. This was judged to be especially important in evaluating computerized decision support systems, particularly early in their development, and the effects to date have been small. Thus, we did not wish to bias our review against such systems by considering those that had been tested with randomization within groups to be on the same footing as those with randomization in separate, independent groups. It is true, however, that, in a given circumstance, the most appropriate approach to randomization may not be the theoretically preferable one and that our decision reduces the precision of testing for reductions in contamination.
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Haynes RB. Analyzing Computer-based Decision Support Systems. Ann Intern Med. 1994;121:469. doi: 10.7326/0003-4819-121-6-199409150-00032

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Published: Ann Intern Med. 1994;121(6):469.

DOI: 10.7326/0003-4819-121-6-199409150-00032

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