This new, descriptive theory adds several elements to the discussion of health behavior change. Concepts included in the theory have strong empirical base. Proposed relationships among constructs are new. All major constructs contain defining concepts. The process components have been clearly articulated. The concept of social facilitation has been expanded and developed. Outcomes have been conceptualized as proximal and distal. The ITHBC is intended to facilitate health behavior change related to management of chronic conditions and to health promotion.