Article
The nature of stable insomnia phenotypes.
Sleep - 1 Jan 2015
Pillai Vivek, Roth Thomas, Drake Christopher L
Abstract excerpt
STUDY OBJECTIVES: We examined the 1-y stability of four insomnia symptom profiles: sleep onset insomnia; sleep maintenance insomnia; combined onset and maintenance insomnia; and neither criterion (i.e., insomnia cases that do not meet quantitative thresholds for onset or maintenance problems). Insomnia cases that exhibited the same symptom profile over a 1-y period were considered to be phenotypes, and were...
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