Table 3 The prognostic value of serum PCT determinations in the prediction of spontaneous preterm delivery and admission-to-delivery interval
PCT ≥ 0.038 ng/mL | Delivery | ||
|---|---|---|---|
≤ 36 weeks | Within 7 days | Within 14 days | |
Sensitivity (%) | 63.3 [43.9–80.1] | 57.1 [18.4–90.1] | 66.7 [34.9–90.1] |
Specificity (%) | 47.3 [36.9–57.9] | 44.8 [35.6–54.3] | 45.9 [36.4–55.7] |
Positive predictive value (%) | 27.9 [17.7–40.1] | 5.9 [1.6–14.4] | 11.8 [5.2–21.9] |
Negative predictive value (%) | 80.0 [67.0–89.6] | 94.5 [84.9–98.9] | 92.7 [82.4–98.0] |
Likelihood ratio + | 1.20 [0.86–1.68] | 1.04 [0.53–2.01] | 1.23 [0.80–1.91] |
Likelihood ratio - | 0.77 [0.46–1.30] | 0.96 [0.40–2.30] | 0.73 [0.32–1.66] |