The purpose of this study is to investigate the relationship between intentional online information seeking, incidental online information seeking, eHealth literacy, and shared decision-making; the relationship between intentional online information seeking, incidental online information seeking, information overload, eHealth literacy, information anxiety, and information avoidance in the context of diabetes. The study is based on Wilsons models (1981, 1997, 1999) of information behavior, Williamson's (1998) ecological model of information seeking and use, and S-O-R (Stimulus, Organism, Response) framework (Mehrabian & Russell, 1974). It examines the survey data from diabetic patients aged 18 to 44 years old in the U.S. Linear regression and structural equation modeling approaches were utilized to analyze the data. Results indicated that intentional online information seeking and eHealth literacy have positive impacts on shared decision-making. Information overload is positively related to information anxiety and information anxiety is positively related to information avoidance. Additional analyses also indicated that incidental online information seeking is negatively related to information avoidance, and eHealth literacy is negatively related to information anxiety. Information anxiety positively mediates the relationship from information overload to information avoidance. Results extend existing theoretical frameworks and suggested that there is a necessity to develop information and communication strategies to distribute high quality online health information online and training programs to help decrease diabetes information seekers? information anxiety and information avoidance about diabetes and encourage shared decision-making for diabetic patients. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]