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Objective.   We assessed the validity of selected items on the 2003 revised U.S. Standard Certificate of Live Birth to understand the accuracy of new and existing items.Methods.   We calculated sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of select variables reported on the birth certificate using the medical record as the gold standard for a representative sample of live births in New York City ( n=603) and Vermont ( n=664) in 2009.Results.   In both sites, sensitivity was excellent (&gt;90%) for Medicaid coverage at delivery, any previous live births, and current method of delivery; sensitivity was moderate (70%–90%) for gestational diabetes; and sensitivity was poor ( 90%) specificity and NPV.Conclusion.   Further research is needed to determine how best to improve the quality of data on the birth certificate. Future revisions of the birth certificate may consider removing those items that have consistently proven difficult to report accurately.

Validation of Selected Items on the 2003 U.S. Standard Certificate of Live Birth: New York City and Vermont