Abstract

A procedure is described to judge the quality of clinical chemistry hospital laboratories in The Netherlands. In 1974, 45% of the laboratories took part in the national control scheme. A score system of the results, independent of the standard deviation, opens a provisional possibility to strive for (dynamic) reference laboratories. The Youden plots possibly will unveil systematic method-differences. Discrepancies in results seem to be caused as much by methods/instruments applied, as by unknown factors which are under investigation now.

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