Validation of second trimester miscarriages and spontaneous deliveries [Corrigendum]

Figures & data

Table 3 Sensitivity, specificity, positive predictive value, and kappa scores of pregnancy complications recorded in the Danish National Patient Registry and the Danish Medical Birth Registry

Pregnancy complication	Danish National Patient Registry				Danish Medical Birth Registry
	Sensitivity, % (95 % CI)	Specificity, % (95 % CI)	Positive predictive value, % (95 % CI)	Kappa (95 % CI)	Sensitivity, % (95 % CI)	Specificity, % (95 % CI)	Positive predictive value, % (95 % CI)	Kappa (95 % CI)
Antepartum fetal death
Miscarriages	22.7 (12.0–38.2)	100 (98.5–100)	100 (65.6–100)	0.34 (0.18–0.50)	–	–	–	–
Deliveries	–	–	–	–	–	–	–	–
Multiple pregnancies
Miscarriages	40.9 (30.0–53.7)	99.3 (97.6–99.9)	93.1 (77.2–99.2)	0.52 (0.39–0.64)	–	–	–	–
Deliveries	88.9 (73.0–96.4)	99.3 (97.2–99.9)	94.1 (78.9–99.0)	0.90 (0.83–0.98)	82.4 (65.7–93.2)	99.3 (97.4–99.8)	93.3 (77.9–99.2)	0.86 (0.77–0.96)
Major fetal anomaly
Miscarriages	25.0 (7.3–60.9)	100 (98.7–100)	100 (30.9–100)	0.42 (0.10–0,75)	–	–	–	–
Deliveries	11.1 (5.8–49.3)	99.3 (97.4–99.9)	33.3 (1.7–87.5)	0.15 (–0.13–0.44)	60.0 (27.4–86.3)	100 (98.4–100)	100 (51.9–100)	0.74 (0.50–0.99)
Placental insufficiency/intrauterine growth retardation
Miscarriages	50.0 (17.4–82.6)	100 (98.7–100)	100 (39.6–100)	0.66 (0.35–0.97)	–	–	–	–
Deliveries	52.6 (29.5–74.8)	99.3 (97.3–99.9)	83.3 (50.9–97.1)	0.63 (0.43–0.83)	–	–	–	–
Placental abruption
Miscarriages	14.2 (0.7–58.0)	100 (98.7–100)	1 (5.4–100)	0.25 (−0.15–0.64)	–	–	–	–
Deliveries	65.7 (47.7–80.3)	99.6 (97.6–100)	95.8 (76.9–99.8)	0.76 (0.63–0.88)	62.9 (44.9–78.0)	99.6 (97.7–100)	95.6 (92.2–97.5)	0.74 (0.60–0.87)
Preterm premature rupture of membranes
Miscarriages	22.8 (15.0–33.0)	99.6 (97.7–100)	95.5 (75.1–99.8)	0.30 (0.20–0.41)	–	–	–	–
Deliveries	68.8 (57.1–78.6)	97.0 (93.7–98.7)	88.3 (76.8–94.8)	0.71 (0.62–0.81)	71.4 (59.8–80.9)	97.9 (94.8–99.2)	91.7 (80.9–96.9)	0.75 (0.66–0.84)
Cervical insufficiency
Miscarriages	76.3 (64.5–85.4)	86.9 (82.0–90.3)	58.5 (47.9–68.0)	0.57 (0.47–0.67)	–	–	–	–
Deliveries	77.9(66.5–86.4)	81.4 (75.7–86.0)	57.7 (47.6–67.1)	0.55 (0.45–0.65)	–	–	–	–

Table

Diagnosis recorded in The Danish Medical Birth Registry	Presence of condition in medical records
	Yes	No	Total
Multiple pregnancies, deliveries (D030)
Yes	32	2	34
No	4	275	279
Total	36	277	313

Table

Diagnosis recorded in The Danish Medical Birth Registry	Presence of condition in medical records
	Yes	No	Total
Major fetal anomaly
Yes	6	0	6
No	4	303	307
Total	10	303	313