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  • Title: Associations of allostatic load with sleep apnea, insomnia, short sleep duration, and other sleep disturbances: findings from the National Health and Nutrition Examination Survey 2005 to 2008.
    Author: Chen X, Redline S, Shields AE, Williams DR, Williams MA.
    Journal: Ann Epidemiol; 2014 Aug; 24(8):612-9. PubMed ID: 24985316.
    Abstract:
    PURPOSE: To examine whether allostatic load (AL), a measure of cumulative physiologic dysregulation across biological systems, was associated with sleep apnea, insomnia, and other sleep disturbances. METHODS: Data from the National Health and Nutrition Examination Survey 2005-2008 were used. AL was measured using nine biomarkers representing cardiovascular, inflammatory, and metabolic system functioning. A total of 3330 US adults aged 18 years and older were included in this study. RESULTS: The prevalence of high AL (AL score  ≥3) was the highest among African Americans (26.3%), followed by Hispanic Americans (20.3%), whites (17.7%), and other racial/ethnic group (13.8%). After adjustment for sociodemographic and lifestyle factors, high AL was significantly associated with sleep apnea (odds ratio [OR], 1.92; 95% confidence interval [CI], 1.40-2.63), snoring (OR, 2.20; 95% CI, 1.79-2.69), snorting/stop breathing (OR, 2.16; 95% CI, 1.46-3.21), prolonged sleep latency (OR, 1.42; 95% CI, 1.08-1.88), short sleep duration (<6 hours) (OR, 1.35; 95% CI, 1.00-1.82), and diagnosed sleep disorder (OR, 2.26; 95% CI, 1.66-3.08). There was no clear evidence that observed associations varied by sociodemographic characteristics. CONCLUSIONS: This study suggests significant associations of high AL with sleep apnea, sleep apnea symptoms, insomnia component, short sleep duration, and diagnosed sleep disorder among US adults.
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