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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Is the chronotype associated with obstructive sleep apnea?

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Kim, Lenise Jihe [1] ; Coelho, Fernando Morgadinho [1, 2] ; Hirotsu, Camila [1] ; Bittencourt, Lia [1] ; Tufik, Sergio [1] ; Andersen, Monica Levy [1]
Total Authors: 6
[1] Univ Fed Sao Paulo, Dept Psicobiol, Sao Paulo - Brazil
[2] Univ Fed Sao Paulo UNIFESP, Dept Neurol & Neurocirurgia, BR-04024002 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Sleep and Breathing; v. 19, n. 2, p. 645-651, MAY 2015.
Web of Science Citations: 3

Chronotype and obstructive sleep apnea (OSA) appear to have a similar lifelong evolution, which could indicate a possible effect of morningness or eveningness in the apnea-hypopnea index (AHI). The present study aimed to examine the prevalence of chronotypes in a representative sample of So Paulo city residents and to investigate the effect of chronotypes on the severity of OSA. We performed a cross-sectional analysis using the So Paulo Epidemiologic Sleep Study (EPISONO). All participants underwent a full-night polysomnography and completed the Morningness-eveningness, Epworth Sleepiness Scale, and UNIFESP Sleep questionnaires. Chronotypes were classified as morning-type, evening-type, and intermediate. Morning-type individuals represented 52.1 % of the sample, followed by intermediate (39.5 %), and evening-type (8.4 %) individuals. After stratifying the sample by body mass index (BMI) (> 26.8 kg/m(2)) and age (> 42 years), we observed increased AHI values in morning- and evening-type individuals. We demonstrated, for the first time, an age- and BMI-related effect of morning- and evening-types in OSA severity, suggesting that the intermediate chronotype might play a role as a protective factor in older and overweight patients. (AU)

FAPESP's process: 13/14420-1 - The effects of sleep restriction in an animal model of ischemic brain injury
Grantee:Lenise Jihe Kim
Support Opportunities: Scholarships in Brazil - Master