Table 1.
Accuracy of reporting in the NSW Inpatient Statistics Collection, New South Wales, Australia, 1994–1996
| Description | NICUS data N |
APDC data N |
Both data sets* N |
Sn % (95% CI) |
Sp % (95% CI) |
NPV % (95% CI) |
PPV % (95% CI) |
| Diagnoses | |||||||
| Death in birth admission | 289 | 261 | 260 | 90.0 (85.9–93.2) | 100 (99.7–100) | 98.7 (98.1–99.1) | 99.6 (97.9–100) |
| Very low birthweight 400–1499 g | 1,242 | 1,216 | 1213 | 97.7 (96.7–98.4) | 99.7 (99.2–99.9) | 97.6 (96.5–98.4) | 99.8 (99.3–99.9) |
| Intra-ventricular hemorrhage | 394 | 238 | 205 | 52.0 (47.0–57.1) | 98.4 (97.7–98.9) | 91.4 (90.1–92.5) | 86.1 (81.1–90.3) |
| Any brain hemorrhage‡ | 400 | 281 | 251 | 62.8 (57.8–67.5) | 98.4 (97.7–98.9) | 92.4 (91.1–93.5) | 89.3 (85.1–92.7) |
| Retinopathy of prematurity | 273 | 169 | 157 | 57.5 (51.4–63.4) | 99.4 (99.0–99.7) | 94.9 (93.9–95.7) | 92.9 (87.9–96.3) |
| Respiratory distress syndrome‡ | 1205 | 1022 | 991 | 82.2 (80.0–84.4) | 92.4 (89.4–94.8) | 63.9 (59.8–67.7) | 97.0 (95.7–97.9) |
| Transient tachypnea‡ | 347 | 206 | 146 | 42.1 (36.8–47.5) | 85.3 (81.5–88.6) | 63.5 (59.3–67.5) | 70.9 (64.2–77.0) |
| Meconium aspiration‡ | 56 | 40 | 38 | 67.9 (54.0–79.7) | 99.5 (98.2–99.9) | 95.8 (93.4–97.5) | 95.0 (83.1–99.4) |
| Pneumonia‡ | 29 | 15 | 14 | 48.3 (29.4–67.5) | 99.8 (98.6–100) | 96.5 (94.2–98.0) | 93.3 (68.1–99.8) |
| Pulmonary hypertension‡ | 53 | 34 | 34 | 64.2 (49.8–79.9) | 100 (99.1–100) | 95.6 (93.2–97.3) | 100 (89.7–100) |
| Necrotizing enterocolitis | 76 | 55 | 47 | 61.8 (50.0–72.8) | 99.7 (99.3–99.9) | 98.8 (98.3–99.2) | 85.5 (73.3–93.5) |
| Selected major anomalies† | 41 | 42 | 39 | 95.1 (83.5–99.4) | 99.9 (99.6–100) | 99.9 (99.7–100) | 92.9 (80.5–98.5) |
| Procedures | |||||||
| Any mechanical ventilation (including CPAP) | 2,023 | 1,552 | 1540 | 76.1 (74.2–78.0) | 97.1 (94.9–98.5) | 45.1 (41.8–48.5) | 99.2 (98.7–99.6) |
| Cont. positive airways pressure | 1055 | 785 | 691 | 65.5 (62.5–68.4) | 93.2 (91.7–94.4) | 77.9 (75.8–79.9) | 88.0 (85.5–90.2) |
| Drainage of air leak | 135 | 60 | 50 | 37.0 (28.9–45.8) | 99.6 (99.2–99.8) | 96.4 (95.6–97.1) | 83.3 (71.5–91.7) |
| Patent ductus arteriosus surgery | 19 | 18 | 18 | 94.7 (74.0–99.9) | 100 (99.8–100) | 100 (99.8–100) | 100 (81.5–100) |
| Necrotizing enterocolitis surgery | 17 | 14 | 14 | 82.4 (56.6–96.2) | 100 (99.8–100) | 99.9 (99.6–100) | 100 (76.8–100) |
| Major surgery | 77 | 74 | 70 | 90.9 (82.2–96.3) | 99.8 (99.6–100) | 99.7 (99.4–99.9) | 94.6 (86.7–98.5) |
Sn = Sensitivity, Sp = Specificity;* N = 2,432;
†Selected major anomalies included diaphragm anomalies, abdominal wall anomalies, spina bifida, tracheo-esophageal fistula and tetralogy of fallot. ‡ These diagnoses may be under-recorded in the NICUS data since only a primary diagnosis could be recorded (see Table 2)