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  1. A randomized trial of a computer-based intervention to reduce utilization of redundant laboratory tests.

    Article - En anglais


    To determine the impact of giving physicians computerized reminders about apparently redundant clinical laboratory tests.


    We performed a prospective randomized controlled trial that included all inpatients at a large teaching hospital during a 15-week period.

    The intervention consisted of computerized reminders at the time a test was ordered that appeared to be redundant.

    Main outcome measures were the proportions of clinical laboratory orders that were canceled and the proportion of the tests that were actually performed.


    During the study period, there were 939 apparently redundant laboratory tests among the 77,609 study tests that were ordered among the intervention (n=5,700 patients) and control (n=5,886 patients) groups.

    In the intervention group, 69% (300 of 437) of tests were canceled in response to reminders.

    Of 137 overrides, 41% appeared to be justified based on chart review.

    In the control group, 51% of ordered redundant tests were performed, whereas in the intervention group only 27% of ordered redundant tests were performed (P<0.001).

    However, the estimated annual savings in laboratory charges was only $35,000.

    This occurred because only 44% of redundant tests performed had computer orders, because only half the computer orders were screened for redundancy, and because almost one-third of the reminders were overridden. (...)

    Mots-clés Pascal : Essai laboratoire, Randomisation, Base donnée, Assistance ordinateur, Redondance, Organisation information, Utilisation, Mémoire, Evaluation, Essai clinique, Homme, Organisation santé, Informatique

    Mots-clés Pascal anglais : Laboratory test, Randomization, Database, Computer aid, Redundancy, Information organization, Use, Memory, Evaluation, Clinical trial, Human, Public health organization, Computer science

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 99-0168795

    Code Inist : 002B02A07. Création : 16/11/1999.