Comparison of notification rates to the National Congenital Anomaly System (NCAS): the “passive system” compared with the Trent and Wales registers
| Source of information | Year 1 (1998) | Year 2 (1999) | Year 3 (2000) | Year 4 (2001) | Total |
|---|---|---|---|---|---|
| NCAS passive system notification rates (No/10 000 live + still births) | 87.6 | 96.2 | 95.4 | 86.5 | 91.3 |
| Trent CAR notification rates (No/10 000 live + still births) | 119.3 | 284.5 | 279.6 | 303.7 | 244.5 |
| Passive system notification rates compared with Trent CAR | 73.4% | 33.8% | 34.1% | 28.4% | 37.4% |
| CARIS notification rates (No/10 000 live + still births) | 312.6 | 296.9 | 327.8 | 280.8 | 304.7 |
| Passive system notification rates compared with CARIS | 28.0% | 32.4% | 29.1% | 30.8% | 30.0% |