Figures & data
Figure 1 Conceptual model of the development of chronic insomnia and the changing factors that play a role over the course of the disorder.
Reprinted from Principles and Practices of Sleep Medicine, 5th ed. In: Spielman, Yang, Glovinsky, editors. Chapter 144-Assessment Techniques for Insomnia; Pages 1632–1645, adapted from Spielman, Caruso, Glovinsky. Copyright Elsevier 2011. Reprinted with permission from Elsevier.Citation151
Notes: In this particular case, at the onset of the insomnia, precipitating factors predominate. When the insomnia becomes chronic, perpetuating factors become the main feature contributing to the sleep disturbance.
