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Table 2 Agreements and errors for AST of GPC and GNR for the direct and routinely used Phoenix method

From: Evaluation of direct inoculation of the BD PHOENIX system from positive BACTEC blood cultures for both Gram-positive cocci and Gram-negative rods

 

Direct vs routinely used method

Direct method after discrepancy analysis

Routine method after discrepancy analysis

GPC (n = 84)

   

Categorical agreement

93.1%

95.4%

97.3%

Minor errors

1.7%

1.1%

0.7%

Major errors

4.2%

3.1%

0.8%

Very major errors

0.9%

0.4%

1.6%

GNR (n = 49)

   

Categorical agreement

97.6%

99.0%

98.4%

Minor errors

1.9%

0.7%

1.4%

Major errors

0.1%

0.0%

0.1%

Very major errors

0.4%

0.3%

0.1%