Study authors determine if perceived experiences of discrimination (both in general and in medical care) were associated with comfort providing race/ethnicity information, and conversely, to worry about providing the information. Data was collected via a telephone survey of 480 Californians, including 101 whites, 98 Asians, 173 Hispanics, 82 blacks and 26 multiracial individuals. The researchers concluded that perceived experiences of discrimination are associated with greater discomfort and worry about providing race/ethnicity data. Health care institutions should consider how they can address the public's concerns about possible misuses of data.