In "An Increase in the Incidence of Gestational Diabetes Mellitus:Northern California, 1991-2000" by A. Ferrara, MD, PhD, H. S.Kahn, MD, C. P. Quesenberry, PhD, C. Riley, MS, and M. M. Hedderson,MPH (Obstet Gynecol 2004;103:52633), the percentagesof those screened in the year 2000 are incorrect in Figure 2.The correct values are as follows: African American, 90.12%;Hispanic, 92.38%; Asian, 94.88%; and white, 92.15%.