TABLE 4.

Somatic coliphage fluorescence-based prediction compared to STEP-1 plaquea

Sample category in STEP-1 plaqueNo. of samples in STEP-2 fluorescence- based assay
PositiveNegativeTotal
Positive1132115
Negative91625
Total12218140
  • a Sensitivity, 98.3%; specificity, 64.0%; overall agreement, 92.1%; Cohen kappa value, 0.699; false-negative error rate, 1.7%; false-positive error rate, 36%; miscalculation rate, 7.9%.