Table 5 Performance of the number of weeks between the placental perfusion measurement and delivery in screening for unexplained stillbirths under regular and assumed conditions
From: Abnormal placental perfusion and the risk of stillbirth: a hospital-based retrospective cohort study
| Stratification | Area under the curve (95% CI) | Initiation time (weeks) | Regular condition | Assumed condition a | ||||
|---|---|---|---|---|---|---|---|---|
| Criterion value (weeks) | Sensitivity (% (95% CI)) | Specificity (% (95% CI)) | Criterion value (weeks) | Sensitivity (% (95% CI)) | Specificity (% (95% CI)) | |||
| Placental perfusion | ||||||||
| Normal group | 0.948 (0.945–0.951) | ≥ 3 | ≤ 15.0 | 90.5 (69.6 ~ 98.8) | 83.4 (83.0–83.9) | ≤ 11.8 | 66.7 (43.0 ~ 85.4) | 98.8 (98.7–99.0) |
| APP group | 0.867 (0.855–0.878) | ≥ 5 | ≤ 14.6 | 85.7 (57.2 ~ 98.2) | 84.4 (83.1–85.5) | ≤ 14.0 | 78.6 (49.2 ~ 95.3) | 89.4 (88.3–90.4) |
| Sex | ||||||||
| Male | 0.972 (0.969–0.974) | ≥ 3 | ≤ 14.6 | 100 (76.8–100) | 89.03 (88.5–89.5) | ≤ 8.3 | 50 (23.0–77.0) | 99.7 (99.6–99.7) |
| Female | 0.895 (0.890–0.900) | ≥ 4 | ≤ 15.0 | 80.9 (58.1–94.6) | 83.66 (83.1–84.2) | ≤ 11.9 | 61.9 (38.4–81.9) | 98.7 (98.5–98.9) |
| Combination | ||||||||
| Normal and male | 0.985 (0.983–0.987) | ≥ 3 | ≤ 14.1 | 100 (66.4–100) | 93.3(92.9–93.7) | ≤ 8.3 | 66.7 (29.9–92.5) | 99.7 (99.6–99.8) |
| Normal and female | 0.924 (0.920–0.929) † | ≥ 4 | ≤ 15.4 | 91.7 (61.5–99.8) | 76.41 (75.7–77.1) | ≤ 11.3 | 58.3 (27.7–84.8) | 99.2 (99.0–99.3) |
| APP and male | 0.920 (0.906–0.931) † | ≥ 5.1 | ≤ 14.6 | 100 (47.8–100) | 84.0 (82.2–85.6) | ≤ 14.6 | 100 (47.8–100) | 84.0 (82.2–85.6) |
| APP and female | 0.839 (0.820–0.857) | ≥ 5 | ≤ 14.0 | 77.8 (40.0–97.2) | 89.5 (87.9–90.9) | ≤ 11.9 | 66.7 (29.9–92.5) | 96.8 (95.8–97.6) |