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Table 3 The prognostic value of serum PCT determinations in the prediction of spontaneous preterm delivery and admission-to-delivery interval

From: Efficacy of serum procalcitonin to predict spontaneous preterm birth in women with threatened preterm labour: a prospective observational study

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]