The primary objectives for this study are to develop an estimate of the prevalence of health literacy at four geographically diverse Veterans Affairs Medical Centers (Minneapolis, Portland, Durham, and West Los Angeles), and for specific groups based on age, race, education, and geographic location. The investigators' secondary objectives are to illustrate the potential significance of poor health literacy by linking estimates for those over 50 years old to colorectal cancer (CRC) screening data and examining variation in screening rates by health literacy levels. The investigators expect that people with lower health literacy skills will be less adherent to CRC screening guidelines.