From: Timing of delivery in a high-risk obstetric population: a clinical prediction model
Predicted probability (%) | <15.0a | <27.0 | <50.0 | <65.0 |
---|---|---|---|---|
Number of women | 233 | 510 | 1410 | 2528 |
N women delivered at ≤7 days (N = 1473 overall) | 14 | 56 | 440 | 1108 |
N women delivered at >7 days (N = 1539 overall) | 219 | 454 | 970 | 1420 |
Sensitivity | 99.1% (98.4–99.4) | 96.2% (95.1–97.1) | 70.1% (67.7–72.4) | 24.8% (22.6–27.1) |
Specificity | 14.2% (12.6–16.1) | 29.5% (27.3–31.8) | 63.0% (60.0–65.4) | 92.3% (90.8–93.5) |
False positive rate | 85.8% (83.9–87.4) | 70.5% (68.2–72.7) | 37.0% (34.6–40.0) | 7.7% (6.4–9.2) |
False negative rate | 0.9% (0.6–1.6) | 3.8% (2.9–4.9%) | 29.9% (27.6–32.3) | 75.2% (72.9–77.4) |
Positive predictive value | 52.5% (50.6–54.4) | 56.6% (54.7–58.6) | 64.5% (62.1–66.8) | 75.4% (71.4–79.0) |
Negative predictive value | 94.0% (90.2–96.4) | 89.0% (86.0–91.5) | 68.9% (66.3–71.2) | 56.2% (54.2–58.1) |
Positive likelihood ratio | 1.16 (1.13–1.18) | 1.37 (1.32–1.41) | 1.90 (1.76–2.04) | 3.93 (3.15–4.91) |
Negative likelihood ratio | 0.07 (0.04–0.11) | 0.13 (0.10–0.17) | 0.47 (0.43–0.52) | 0.82 (0.79–0.84) |