Comparison of the National Congenital Anomaly system (NCAS) with the National Down Syndrome Cytogenetic Register (NDSCR)
| Years of reporting | Information source | Percentage of anomalies on the NCAS compared with the NDSCR |
|---|---|---|
| 1974–87 | National estimates | 67 |
| 1990–93 | NDSCR | 48 |
| 1995–98 | NDSCR | 39–49 |
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Online ISSN 1468-2052
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