Table 6 Positive predictive values of Crossing point (Cp) values with different cut-off limits for detection of severe sepsis/septic shock, for blood samples with a positive SeptiFast test for Gram-positive bacteria
Cut-off Cp value | Staphylococcus aureus(n = 24) | Streptococcus species(n = 13) | Gram-positive bacteria, other* (n = 5) | Gram-positive bacteria total (n = 42) |
|---|---|---|---|---|
<15.0 | 60% (3/5) | 100% (1/1) | 50% (1/2) | 62% (5/8) |
<17.5 | 62% (5/8) | 71% (5/7) | 67% (2/3) | 67% (12/18) |
<20.0 | 55% (6/11) | 38% (5/13) | 80% (4/5) | 52% (15/29) |
<22.5 | 33% (8/24) | 41% (17/42) |