IDEA-NW Project Linkages as of February 28, 2013 Data source Date Cases sent for linkage Matches Number (%) misclassified among matches Percent of misclassified coded as White Percent of misclassified with unknown or missing race AI/AN in database prior to linkage AI/AN in database after linkage Percent increased ascertain-ment of AI/AN Misclassification prevalence among all post-linkage AI/AN