Summary of the clinical performance of Portrait Staph ID/R BCP versus conventional methods for the identification of Staphylococcus species in 765 prospective blood culturesa

Organism(s) identified (all sites combined)% Agreement
TP/TP + FNPPA (95% CI)TN/TN + FPNPA (95% CI)
S. aureus 211/21498.6 (96.0–99.5)549/55199.6 (98.7–99.9)
S. lugdunensis 3/3100 (43.9–100)761/76299.9 (99.3–99.9)
Staphylococcus species other than S. aureus or S. lugdunensis444/44998.9 (97.4–99.5)311/31399.4 (97.7–99.9)
  • a TP, true positive; TN, true negative; FP, false positive; FN, false negative; PPA, positive percent agreement; NPA, negative percent agreement; CI, confidence interval.