The purpose of this study was to understand the level of functional health literacy and its influence on perceived health status in Korean older adults. A cross-sectional survey was conducted in Daegu, Kyungpook and Busan province. A total of 103 older adults aged 65 yr or older were interviewed in person between July 1 to August 30, 2007. A high proportion of older adults were unable to read and understand written basic medical instructions. Only 40-50% were able to comprehend directions for taking medication four times a day or on an empty stomach. Only 11-38% were able to understand information regarding treatment procedure, informed consent, or educational material for elderly fall prevention. Individuals who were older, single, and had less education and income were more likely to have lower functional health literacy. After adjusting for sociodemographic variables, individuals with lower health literacy had poorly perceived health status. Many Korean older adults have a very low level of functional literacy. Low health literacy was independently associated with poorly perceived health status.

Background: This study evaluated the effect of a simplified informed consent form for clinical trials on the understanding and efficacy of informed consent information across health literacy levels. Methods: A total of 150 participants were randomly assigned to one of two groups and provided with either standard or simplified consent forms for a cancer clinical trial. The features of the simplified informed consent form included plain language, short sentences, diagrams, pictures, and bullet points. Results: Levels of objective and subjective understanding were significantly higher in participants provided with simplified informed consent forms relative to those provided with standard informed consent forms. The interaction effects between type of consent form and health literacy level on objective and subjective understanding were nonsignificant. Conclusion: Simplified informed consent was effective in enhancing participant’s subjective and objective understanding regardless of health literacy.