Effect of a price display intervention on laboratory test ordering behavior of general practitioners.

And while other interventions, such as these meetings and other unmeasured influences over time could have a confounding effect, our study results show that while diagnostic testing peer audit and feedback groups have been implemented in Period 1, there was still an increasing trend in ordering rate to be seen towards Period 2.

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For a certain group of tests (thrombocytes, leucocytes, ALAT and ESR), a decreasing trend was shown throughout time, as seen in Fig. 4 A-D.

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