<qa>  What is the amount of information that is not proper with the individual patient?In patient education, the amount of information that is not proper with the individual patient, such as too much or too little, can increase anxiety to patient. Needs-based patient education has been developed to determine the proper amount of information and provide the education based on patient needs. This study aims to compare needs-based patient education to traditional patient education in how they affect preoperative anxiety and patient satisfaction. 