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Poor sleep moderates the relationship between daytime napping and inflammation in Black and White men

机译：睡眠不佳调节黑人和白人白天小睡和炎症之间的关系

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Objectives: To test whether napping was associated with 2 inflammatory markers with known relationships to cardiovascular disease: high-sensitivity C-reactive protein (hsCRP) and interleukin-6 (IL-6). Because IL-6 is known to impact central inflammatory processes that relate to sleep regulation, including subjective fatigue, we tested whether this relationship was moderated by sleep duration, sleep efficiency, and self-reported sleep quality. Design: Cross-sectional. Participants: A community sample of Black and White men (N = 253) completed a week of actigraphy and diary measures of sleep and napping and provided a fasting blood sample. Measurements/analysis: Napping was measured as the proportion of days with at least 30 minutes napped and the average minutes napped per day. Linear regressions adjusted for race, socioeconomic status, employment, body mass index, smoking, medications that affect sleep or inflammation, working the nightshift, and day-sleeping status, followed by interaction terms between napping and sleep duration, efficiency, and quality, respectively. Results: There were no significant main effects of actigraphy- or diary-measured napping on IL-6 or hsCRP. Moderation analyses indicated elevated IL-6 values among men who napped more days (by actigraphy) and demonstrated short sleep duration (P = .03). Moderation analyses also indicated elevated IL-6 among men who demonstrated greater average minutes napped (by actigraphy) and short sleep duration (P < .001), low efficiency (P = .03), and poor quality (P = .03). Moderation analyses involving diary napping or hsCRP were not significant. Conclusions: Actigraphy-assessed daytime napping is related to higher IL-6 in men who demonstrate worse sleep characteristics. Daytime napping may pose additional risk for inflammation beyond the known risk conferred by short sleep.
机译：目的：测试小睡是否与2个与心血管疾病有已知关系的炎症标记有关：高敏感性C反应蛋白（HSCRP）和白介素6（IL-6）。由于已知IL-6会影响与睡眠调节有关的中心炎症过程，包括主观疲劳，因此我们测试了这种关系是否因睡眠持续时间，睡眠效率和自我报告的睡眠质量而缓和。设计：横截面。参与者：黑人和白人男性的社区样本（n = 253）完成了一周的积极和小睡的日记度量，并提供了禁食的血液样本。测量/分析：小睡作为天数的比例，至少为30分钟，每天平均每天午睡。针对种族，社会经济状况，就业，体重指数，吸烟，影响睡眠或炎症的药物的线性回归，工作夜班和日常呼吸状态，然后分别在午睡时间和睡眠时间，效率和质量之间进行互动术语。结果：Actraphy或Diary测量的小睡对IL-6或HSCRP没有显着的主要影响。适度分析表明，在午睡时间（通过行为）的男性中，IL-6值升高，并且表现出短时间的睡眠时间（p = .03）。适度分析还表明，在表现出更高平均分钟（按精神分裂症）和短睡眠持续时间（p <.001），低效率（p = .03）和质量差（p = .03）的男性中，IL-6升高。涉及日记或HSCRP的适度分析不显着。结论：经过精心照相的白天小睡与表现出较差睡眠特征的男性的IL-6有关。白天的小睡可能会带来额外的炎症风险，超出了短暂睡眠赋予的已知风险。

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