Systems, devices and methods for managing a physiological condition are configured to store predetermined output segments of content, analyze physiological data and other user information, and generate user-friendly information that provides an interpretation of the data (e.g., identifies selected data points, or determines pattern of physiological data over selected period(s)). An output segment management system with rules engine and method combines selected output segments to generate a presentation or message (e.g., with text, graphical, multimedia, video and/or audio information). The resulting presentation or message provides user information such as an explanation of selected data with selected user information incorporated therein, and optional recommendations (e.g., suggested user actions based on a designated protocol such as a clinical protocol).