Table 1 The total prevalence of malformations at birth before and after prenatal screening was formally instituted
Number or Prevalence | 1973-2000 | 2001-2011 | p-value1 |
|---|---|---|---|
Number of newborns included in the analysis | 23 822 | 6626 | |
Number of newborns with BD | 816 | 283 | |
Prevalence of BD at birth (per 1000 newborns)2 | 34.2 (31.9-36.5)2 | 42.8 (38.0-47.7) | 0.001 |
Number of newborns with forms of BD requiring mandatory reporting | 175 | 48 | |
Prevalence at birth of BD forms requiring mandatory reporting (per 1000 newborns)2 | 7.3 (6.3-8.4) | 7.3 (5.2-9.4) | 0.500 |