Table 1 Reliability of reporting of bleeding-related conditions in coded hospital data across two tertiary hospitals, New South Wales, 2011–2015, compared to obstetric data (ObstetriX) as the reference standard
ObstetriX (%) | Coded hospital data (%) | Both | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | |
|---|---|---|---|---|---|---|---|
Anaemia (nutritional or haemolytic) | 1530 (4.2) | 1425 (4.0) | 206 | 13.5 (11.8–15.3) | 96.5 (96.3–96.7) | 14.5 (12.7–16.4) | 96.2 (96.0–96.4) |
Nutritional anaemias | 1412 (3.9) | 308 (0.9) | 99 | 7.0 (5.7– 8.5) | 99.4 (99.3–99.5) | 32.1 (27.0–37.7) | 96.3 (96.1–96.5) |
Haemolytic anaemias | 140 (0.4) | 64 (0.2) | 23 | 16.4 (10.7–23.6) | 99.9 (99.8–99.9) | 35.9 (24.3–48.9) | 99.7 (99.6–99.7) |
Iron deficiency anaemia | 1341 (3.7) | 1415 (3.9) | 170 | 12.7 (10.9–14.6) | 96.4 (96.2–96.6) | 12.0 (10.4–13.8) | 96.6 (96.4–96.8) |
Anaemia (Hb < 110 g/L) in pregnancy | 6819 (19.4) | 1400 (3.9) | 534 | 7.8 (7.2–8.5) | 96.9 (96.7–97.1) | 38.1 (35.6–40.8) | 81.4 (81.0–81.8) |
B12 deficiency anaemia | 113 (0.3) | 14 (0.0) | 5 | 4.4 (1.5–10.0) | 100.0 (100.0–100.0) | 35.7 (12.8–64.9) | 99.7 (99.6–99.8) |
Any bleeding before birtha | 985 (2.7) | 1128 (3.1) | 641 | 65.1 (62.0– 68.1) | 98.6 (98.5– 98.7) | 56.8 (53.9–59.7) | 99.0 (98.9–99.1) |
Antepartum haemorrhage | 798 (2.2) | 874 (2.4) | 449 | 56.3 (52.7–59.7) | 98.8 (98.7–98.9) | 51.4 (48.0–54.7) | 99.0 (98.9–99.1) |
Intrapartum haemorrhage | 155 (0.4) | 130 (0.4) | 65 | 41.9 (34.1–50.1) | 99.8 (99.8–99.9) | 50.0 (41.1–58.9) | 99.8 (99.7–99.8) |
Postpartum haemorrhage (PPH) | 4330 (12.0) | 4001 (11.1) | 3585 | 82.8 (81.6–83.9) | 98.7 (98.6–98.8) | 89.6 (88.6–90.5) | 97.7 (97.5–97.8) |
PPH following caesarean section | 1158 (10.7) | 902 (8.3) | 741 | 64.0 (61.2–66.7) | 98.3 (98.1–98.6) | 82.2 (79.5–84.6) | 95.8 (95.4–96.2) |
PPH following vaginal birth | 3170 (12.6) | 3097 (11.4) | 2842 | 89.7 (88.5–90.7) | 98.8 (98.7–99.0) | 91.8 (90.7–92.7) | 98.5 (98.4–98.7) |
Red blood cell transfusion | 575 (1.6) | 681 (1.9) | 531 | 92.4 (89.9–94.4) | 99.6 (99.5–99.6) | 78.0 (74.7–81.0) | 99.9 (99.8–99.9) |
Placental abruption | 126 (0.3) | 150 (0.4) | 86 | 68.3 (59.4–76.3) | 99.8 (99.8–99.9) | 57.3 (49.0–65.4) | 99.9 (99.9–99.9) |
Placenta praevia | 337 (0.9) | 379 (1.1) | 274 | 81.3 (76.7–85.3) | 99.7 (99.6–99.8) | 72.3 (67.5–76.7) | 99.8 (99.8–99.9) |
Placenta accreta | 22 (0.1) | 74 (0.2) | 15 | 68.2 (45.1–86.1) | 99.8 (99.8–99.9) | 20.3 (11.8–31.2) | 100.0 (100.0–100.0) |
Thalassaemia | 751 (2.1) | 23 (0.1) | 19 | 2.5 (1.5–3.9) | 99.9 (99.9–100.0) | 82.6 (61.2–95.1) | 98.0 (97.8–98.1) |
Platelet disorders | 137 (0.4) | 222 (0.6) | 34 | 24.8 (17.8–32.9) | 99.5 (99.4–99.55) | 15.3 (10.9–20.7) | 99.7 (99.7–99.8) |
Coagulation disorders | 191 (0.5) | 87 (0.2) | 22 | 11.5 (7.4–16.9) | 99.8 (99.8–99.86) | 25.3 (16.6–35.8) | 99.5 (99.5–99.6) |
Hysterectomy | 25 (0.1) | 29 (0.1) | 24 | 96.0 (79.7–99.9) | 99.9 (99.9–100.0) | 82.8 (64.2–94.2) | 100.0 (100.0–100.0) |