Summary of the HLS-EU-Q47 Health Literacy Tool 1. Background and Conceptual Model The current standards for measuring health literacy (HL) were established following a systematic review by Sørensen in 2012, which introduced a model that gained international recognition . This model defines health literacy as the knowledge, motivation, and competencies required for individuals to access, understand, appraise, and apply health information to make daily decisions regarding their well-being . The HLS-EU-Q47 was subsequently developed by a consortium of eight European countries to serve as a comprehensive assessment tool . 2. Framework and Matrix Structure The HLS-EU-Q47 is structured as a 3x4 matrix, encompassing 12 total dimensions . This matrix combines two primary axes: Continuum of Care (Horizontal): This includes Health Care (16 items), Disease Prevention (15 items), and Health Promotion (16 items) . Process Dimensions (Vertical): This tracks the ability to access, understand, appraise, and apply health information . 3. Scoring and Measurement System The survey consists of 47 items where respondents rate the perceived difficulty of specific tasks . Each item is answered on a 4-point scale: 1 for very difficult, 2 for difficult, 3 for easy, and 4 for very easy . To determine the final score, the tool uses a standardized formula: Score = (mean - 1) * 50 / 3, resulting in a maximum possible score of 50 points . 4. Health Literacy Levels (Cut-off Points) The scores are used to categorize the health literacy level of individuals into four distinct groups : Inadequate: Scores from 0 to 25 . Likely Problematic: Scores above 25 and up to 42 . Likely Sufficient: Scores above 42 and up to 50 . Limited: Scores from 0 to 33, representing a combination of the inadequate and problematic categories . 5. International Adaptations and Short Forms Because the 47-item version is time-consuming, researchers developed short forms such as the HLS-EU-Q16 and the even shorter HLS-EU-Q6 . The tool has been validated for use in six Asian countries, proving its cross-cultural reliability . In Thailand, the framework was adapted into the HLS-TH-Q87, which consists of 87 items across 20 dimensions . This Thai version integrates national health goals, such as the "66 Key Messages," and adds a specific dimension for Health Products