Comparative investigation of the psychophysiologic and idiopathic insomnia disorder phenotypes: psychologic characteristics, patients' perspectives, and implications for clinical management.
STUDY OBJECTIVES: Insomnia is a common disorder, yet its proposed behavioral phenotypes are seldom differentiated. Two consecutive studies were designed to investigate psychologic characteristics and treatment preferences of people with idiopathic insomnia (IdI) relative to psychophysiologic insomnia (PI). DESIGN: Cross-sectional, two-group comparison studies. SETTING: Specialized sleep research center. PARTICIPANTS: 40 participants (29 female, mean age 46 yr) participated in study 1. An add...Expand abstract
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