Table 3 Consistency of reporting of anaemia and blood related disorders in coded hospital data compared to obstetric data (ObstetriX) from two tertiary hospitals, New South Wales, 2011–2015, by pregnancy characteristics
Condition | Characteristic | Value | Source of identification of condition | NPV (95% CI) | ||||
|---|---|---|---|---|---|---|---|---|
ObstetriX data | Coded hospital data | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | ||||
Anaemia (nutritional or haemolytic) | Overall | 1530 | 1425 | 13.5 (11.8–15.3) | 96.5 (96.3–96.7) | 14.5 (12.7–16.4) | 96.2 (96.0–96.4) | |
Parity | Nulliparous | 758 | 809 | 13.2 (10.9–15.8) | 95.6 (95.3–95.9) | 12.4 (10.2–14.8) | 95.9 (95.6–96.2) | |
Parous | 766 | 607 | 13.7 (11.4–16.3) | 97.3 (97.0–97.5) | 17.3 (14.4–20.5) | 96.4 (96.1–96.7) | ||
Birth year | 2011 | 262 | 176 | 8.0 (5.0–12.0) | 97.7 (97.3–98.0) | 11.9 (7.5–17.7) | 96.4 (96.0–96.9) | |
2012 | 263 | 146 | 7.6 (4.7–11.5) | 98.2 (97.8–98.5) | 13.7 (8.6–20.4) | 96.5 (96.1–96.9) | ||
2013 | 281 | 259 | 11.7 (8.2–16.1) | 96.7 (96.2–97.1) | 12.7 (8.9–17.4) | 96.3 (95.9–96.8) | ||
2014 | 355 | 455 | 22.0 (17.8–26.6) | 94.8 (94.3–95.3) | 17.1 (13.8–20.9) | 96.1 (95.6–96.6) | ||
2015 | 369 | 389 | 14.6 (11.2–18.7) | 95.2 (94.7–95.7) | 13.9 (10.6–17.7) | 95.5 (95.0–96.0) | ||
Model of care | Hospital medical a | 625 | 642 | 18.2 (15.3–21.5) | 96.1 (95.7–96.4) | 17.8 (14.9–20.9) | 96.2 (95.8–96.5) | |
Midwife a | 820 | 687 | 9.5 (7.6–11.7) | 96.6 (96.3–96.9) | 11.4 (9.1–14.0) | 95.9 (95.6–96.2) | ||
Private obstetrician or GP only | 81 | 91 | 17.3 (9.8–27.3) | 97.5 (96.9–98.0) | 15.4 (8.7–24.5) | 97.8 (97.3–98.3) | ||
Transfusion status | Transfused | 50 | 382 | 82.0 (68.6–91.4) | 35.0 (31.0–39.3) | 10.7 (7.8–14.3) | 95.3 (91.3–97.8) | |
Not transfused | 1480 | 1043 | 11.1 (9.6–12.9) | 97.4 (97.2–97.6) | 15.8 (13.7–18.2) | 96.2 (96.0–96.4) | ||
PPH | Overall | 4330 | 4001 | 82.8 (81.6–83.9) | 98.7 (98.6–98.8) | 89.6 (88.6–90.5) | 97.7 (97.5–97.8) | |
Transfusion status | Transfused | 482 | 456 | 88.8 (85.6–91.5) | 69.9 (59.5–79.0) | 93.9 (91.2–95.9) | 54.6 (45.2–63.8) | |
Not transfused | 3848 | 3545 | 82.0 (80.8–83.2) | 98.8 (98.6–98.9) | 89.1 (88.0–90.1) | 97.8 (97.7–98.0) | ||
IPH | Overall | 155 | 130 | 41.9 (34.1–50.1) | 99.8 (99.8–99.9) | 50.0 (41.1–58.9) | 99.7 (99.7–99.8) | |
Transfusion status | Transfused | 12 | 13 | 25.0 (5.5–57.2) | 98.2 (96.8–99.1) | 23.1 (5.0–53.8) | 98.4 (97.0–99.3) | |
Not transfused | 143 | 117 | 43.4 (35.1–51.9) | 99.8 (99.8–99.9) | 53.0 (43.5–62.3) | 99.8 (99.7–99.8) | ||
APH | Overall | 798 | 874 | 56.3 (52.7–59.7) | 98.8 (98.7–98.9) | 51.4 (48.0–54.7) | 99.0 (98.9–99.1) | |
Transfusion status | Transfused | 46 | 30 | 34.8 (21.4–50.2) | 97.4 (95.6–98.5) | 53.3 (34.3–71.7) | 94.5 (92.2–96.3) | |
Not transfused | 752 | 844 | 57.6 (54.0–61.1) | 98.8 (98.7–98.9) | 51.3 (47.9–54.7) | 99.1 (99.0–99.2) | ||
Thalassaemia | Overall | 751 | 23 | 2.5 (1.5–3.9) | 100.0 (100.0–100.0) | 82.6 (61.2–95.0) | 98.0 (97.8–98.1) | |
Transfusion status | Transfused | 25 | 3 | 12.0 (2.5–31.2) | 100.0 (99.3–100.0) | 100.0 (29.2, 100.0) | 96.2 (94.2–97.6) | |
Not transfused | 726 | 20 | 2.2 (1.3–3.6) | 100.0 (100. 100.0) | 80.0 (56.3–94.3) | 98.0 (97.8–98.1) | ||