General ArticlesA Middle-Range Theory for Diabetes Self-management MasteryFearon-Lynch, Jennifer A. MSN, RN; Stover, Caitlin M. PhD, RNAuthor Information College of Nursing, University of Massachusetts Dartmouth. Correspondence: Jennifer A. Fearon-Lynch, MSN, RN, College of Nursing, University of Massachusetts Dartmouth, 285 Old Westport Rd, North Dartmouth, MA 02747 (email@example.com). The authors have disclosed that they have no significant relationships with, or financial interest in, any commercial companies pertaining to this article. Advances in Nursing Science: October/December 2015 - Volume 38 - Issue 4 - p 330-346 doi: 10.1097/ANS.0000000000000087 Buy Metrics Abstract Diabetes mellitus is the seventh leading cause of death in America and affects 382 million people worldwide. Individuals with diabetes must manage the complexity of the disease, its treatment, and complications to avert deleterious consequences associated with the illness. However, not all patients with diabetes successfully gain mastery to positively impact self-management. A new middle-range theory is proposed that merges 2 extant theories, theory of mastery and organismic integration theory, to better understand this human response. The theories' philosophical, theoretical, and conceptual perspectives were examined and relational properties synthesized to provide a conceptual representation of the phenomenon of interest. Copyright © 2015 Wolters Kluwer Health, Inc. All rights reserved.