International Scholarly Research Notices

Review Article

Birth Defects Surveillance in the United States: Challenges and Implications of International Classification of Diseases, Tenth Revision, Clinical Modification Implementation

Table 1

Down syndrome prevalence from population-based birth defects surveillance programs by case ascertainment methods, United States, 2006–2010 [16].
Case ascertainment methodPrevalence per 10,000 births
Active case finding ()10.2–20.0
Passive case finding* ()6.9–20.6
With or without case ascertainment.