Table 2.
Measures of diagnostic accuracy for PCT, CD64 and CRP for detection of septic patients who received antimicrobial therapies, using the optimum cutoff values.
| AUC (95 % CI) | P value | Cut-off | Sensitivity (95 % CI) | Specificity (95 % CI) | PPV (95 % CI) | NPV (95 % CI) | LR+ (95%CI) | LR–(95%CI) | |
|---|---|---|---|---|---|---|---|---|---|
| PCT | 0.726 (0.689–0.762) | <0.001 | 0.08 ng/ml | 75.8 (70.3–80.7) | 62.9 (57.4–68.2) | 63.8 (60.1–67.4) | 75.1 (70.7–79.1) | 2.05 (1.7–2.4) | 0.38 (0.3–0.5) |
| CD64 | 0.692 (0.651–0.732) | <0.001 | 1.70 | 47.2 (41.0–53.6) | 84.5 (79.5–88.6) | 74.5 (68.2–80.0) | 62.5 (59.4–65.4) | 3.04 (2.2–4.1) | 0.62 (0.5–0.7) |
| CRP | 0.719 (0.682–0.754) | <0.001 | >69 mg/L | 51.1 (45.1–57.0) | 83.6 (79.2–87.4) | 72.4 (66.7–77.4) | 67.1 (64.2–69.8) | 3.12 (2.4–4.1) | 0.59 (0.5–0.7) |
PCT, procalcitonin; CD64, neutrophil CD64; CRP, C-reactive protein (CRP).
PCT vs CRP, z = 0.543, p = 0.587.
CD64 vs CRP, z = 0.892, p = 0.373.
PCT vs CD64, z = 1.149, p = 0.251.