摘要目的:探討我國(guó)60歲及以上人群睡眠情況與心血管代謝性共病風(fēng)險(xiǎn)的關(guān)系。方法:基于中國(guó)健康與養(yǎng)老追蹤調(diào)查(CHARLS)2011年和2015年的數(shù)據(jù),選取基線期無(wú)心血管代謝性共病且參與2015年隨訪的人群(年齡≥60歲)作為研究對(duì)象。采用多因素Logistic回歸模型探討睡眠情況(午休時(shí)間、午休長(zhǎng)短、夜間睡眠時(shí)間、夜間睡眠長(zhǎng)短、睡眠質(zhì)量)與心血管代謝性共病風(fēng)險(xiǎn)的關(guān)聯(lián)。根據(jù)高血壓、血脂異常、糖尿病、抑郁、心臟病進(jìn)行亞組分析,探討午休長(zhǎng)短與心血管代謝性共病發(fā)病的關(guān)系。結(jié)果:共納入6 829例研究對(duì)象。多因素Logistic回歸分析結(jié)果顯示,與不午休(0 min)相比,長(zhǎng)午休(≥30 min)的心血管代謝性共病風(fēng)險(xiǎn)升高[OR=1.40,95%CI(1.08,1.82),P<0.05],尤其在高血壓[OR=1.43,95%CI(1.03,1.98),P<0.05]、血脂異常[OR=1.53,95%CI(1.08,2.16),P<0.05]、非糖尿病[OR=1.37,95%CI(1.02,1.83),P<0.05]人群中;與夜間正常睡眠(7~9 h)相比,夜間長(zhǎng)睡眠(>9 h)的心血管代謝性共病風(fēng)險(xiǎn)降低[OR=0.36,95%CI(0.14,0.90),P<0.05]。睡眠質(zhì)量情況與心血管代謝性共病發(fā)病風(fēng)險(xiǎn)無(wú)關(guān)(P>0.05)。結(jié)論:在我國(guó)60歲及以上的人群中,長(zhǎng)午休(≥30 min)會(huì)增加心血管代謝性共病的發(fā)病風(fēng)險(xiǎn),夜間長(zhǎng)睡眠(>9 h)可能會(huì)降低心血管代謝性共病的發(fā)病風(fēng)險(xiǎn)。
關(guān)鍵詞心血管代謝性共病;午休時(shí)間;夜間睡眠時(shí)間;Logistic模型
doi:10.12102/j.issn.1672-1349.2024.15.001
Relationship between Daytime Napping, Nocturnal Sleep and Cardiovascular-metabolic Comorbidities
WU Yanyan, WANG Rumeng, BAI Yanjun, TANG Ziwei, GU Yimeng, HAN Senfu, XUE Mei
Graduate School of Beijing University of Chinese Medicine, Beijing 100029, China; National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing 100091, China
Corresponding AuthorXUE Mei, E-mail: meiar@126.com
AbstractObjective:To explore the relationship between sleep status and the risk of cardiovascular-metabolic comorbidity in Chinese population age over 60 years old.Methods:Based on data from the China Health and Retirement Longitudial Study(CHARLS) in 2011 and 2015,participants without cardiovascular-metabolic comorbidities at baselineage (age over 60 years old) who participated in the 2015 follow-up were selected as subjects.Multivariate Logistic regression model was used to investigate the association between sleep conditions(daytime napping time,daytime napping duration,nocturnal sleep time,nocturnal sleep duration,sleep quality) and the risk of cardiovascular-metabolic comorbidities.Subgroup analysis of hypertension,dyslipidemia,diabetes,depression,and heart disease were conducted to explore the relationship between daytime napping duration and cardiovascular-metabolic comorbidities.Results:A total of 6 829 participants were included.Multivariate Logistic regression analysis showed that compared with participants without daytime napping(0 min),the risk of cardiovascular" metabolic comorbiditiseincreased in participants with daytime napping(≥30 min)(OR=1.40,95%CI 1.08-1.82,P<0.05).Especially in hypertension(OR=1.43,95%CI 1.03-1.98,P<0.05),dyslipidemia(OR=1.53,95%CI 1.08-2.16,P<0.05),and non-diabetes(OR=1.37,95%CI 1.02-1.83,P<0.05).Compared with normal nocturnal sleep(7~9 h),long nocturnal sleep(> 9 h) was associated with a lower risk of cardiovascular-metabolic comorbidities(OR=0.36,95%CI 0.14-0.90,P<0.05).Sleep quality was not associated with the risk of cardiovascular-metabolic comorbidities(P>0.05).Conclusion:Long daytime napping(≥30 min) might increase the risk of cardiovascular-metabolic comorbidities and long nocturnal sleep(>9 h) might decrease the risk of cardiovascular-metabolic comorbidities in Chinese population age over 60 years old.
Keywordscardiovascular-metabolic comorbidities; daytime napping; nocturnal sleep; Logistic model
心血管代謝性共病的患病率正迅速增加[1-4],與心血管代謝性單病病人相比,心血管代謝性共病病人的全因死亡率成倍增高且預(yù)期壽命更短[5]。2018年美國(guó)心臟協(xié)會(huì)(American Heart Association,AHA)將睡眠健康因素納入心血管健康的八大因素中,強(qiáng)調(diào)睡眠在心血管疾病中的重要作用[6]。既往研究表明,睡眠不佳與肥胖、高血壓、糖尿病、冠心病、心力衰竭等多種代謝性疾病相關(guān)[7],夜間睡眠不足、白天夜間的總睡眠不足是心血管代謝性共病的危險(xiǎn)因素[8-10],然而,目前尚無(wú)研究關(guān)注午休時(shí)間、午休長(zhǎng)短與心血管代謝性共病發(fā)病的相關(guān)性。本研究將基于中國(guó)健康與養(yǎng)老縱向研究(China Health and Retirement Longitudinal Study,CHARLS)數(shù)據(jù),分析我國(guó)60歲以上老年人的睡眠情況(包括午休時(shí)間、午休長(zhǎng)短、夜間睡眠時(shí)間、夜間睡眠長(zhǎng)短以及睡眠質(zhì)量)與心血管代謝性共病發(fā)病的關(guān)系。
1對(duì)象與方法
1.1研究對(duì)象
本研究的數(shù)據(jù)來(lái)源于CHARLS研究2011年基線期和2015年隨訪的調(diào)查數(shù)據(jù)。CHARLS研究是一項(xiàng)具有全國(guó)代表性的對(duì)年齡≥45歲中國(guó)人及其配偶的縱向調(diào)查,該研究采用多階段分層概率抽樣方法對(duì)全國(guó)28個(gè)?。ㄗ灾螀^(qū)、直轄市)150個(gè)縣(區(qū))的450個(gè)村(社區(qū))展開(kāi)調(diào)研,通過(guò)標(biāo)準(zhǔn)化問(wèn)卷收集社會(huì)人口學(xué)、生活方式因素和健康信息等數(shù)據(jù)。CHARLS研究的基線期為2011年,每3年進(jìn)行1次隨訪,本研究已獲得北京大學(xué)倫理審查委員會(huì)的批準(zhǔn)(批準(zhǔn)文號(hào):IRB2008-00001052),所有參與者自愿參加調(diào)查研究并簽署知情同意書(shū)。
2011年CHARLS研究調(diào)查了17 706例研究對(duì)象,納入標(biāo)準(zhǔn):1)年齡≥60歲;2)心血管代謝性共病及暴露因素?zé)o缺失值;3)所有協(xié)變量(包括性別、年齡、吸煙、血脂、血糖、抑郁等)無(wú)缺失值;4)無(wú)心血管代謝性共?。?)參與2015年隨訪。
1.2檢測(cè)指標(biāo)
暴露因素包括午休時(shí)間、午休長(zhǎng)短、夜間睡眠時(shí)間、夜間睡眠長(zhǎng)短和睡眠質(zhì)量。其中,午休時(shí)間、夜間睡眠時(shí)間和睡眠質(zhì)量分別通過(guò)問(wèn)卷收集獲得。參考既往研究[11],午休長(zhǎng)短分為不午休(0 min)、短午休(<30 min)和長(zhǎng)午休(≥30 min);夜間睡眠長(zhǎng)短分為夜間正常睡眠(7~9 h)、夜間短睡眠(<7 h)和夜間長(zhǎng)睡眠(>9 h)。睡眠質(zhì)量根據(jù)自我評(píng)價(jià)的睡眠不佳天數(shù)分為很少或沒(méi)有時(shí)間(<1 d)、偶爾或少量時(shí)間(1~2 d)、偶爾或適度的時(shí)間(3~4 d)以及大部分或全部時(shí)間(5~7 d)。
結(jié)局變量為心血管代謝性共病。心血管代謝性疾病包括糖尿病、心臟病、腦卒中、高血壓、血脂異常等,心血管代謝性共病定義為有糖尿病、心臟病和中風(fēng)至少兩種疾?。?-4]。結(jié)合問(wèn)卷調(diào)查與實(shí)驗(yàn)室檢查結(jié)果定義心臟病、腦卒中和糖尿病。心臟病包括心絞痛、充血性心力衰竭、心肌梗死、冠心病和任何其他心臟問(wèn)題,定義為被醫(yī)生診斷的心臟病或目前口服治療心臟病的藥物。腦卒中定義為被醫(yī)生診斷的腦卒中。糖尿病定義為被醫(yī)生診斷的糖尿病,或目前使用降糖藥物或胰島素,或空腹血糖≥7.0 mmol/L(126 mg/dL),或糖化血紅蛋白(HbA1c)≥6.5%。
協(xié)變量包括年齡、性別、文化水平(小學(xué)及以下,小學(xué)以上)、婚姻狀況(已婚,離異/喪偶/同居/從未結(jié)婚)、體質(zhì)指數(shù)(BMI)、吸煙情況、飲酒情況、收縮壓、舒張壓、空腹血糖、HbA1c、總膽固醇、三酰甘油、高密度脂蛋白膽固醇、低密度脂蛋白膽固醇、C反應(yīng)蛋白(C-reactive protein,CRP)、血肌酐、三酰甘油-葡萄糖指數(shù)(triglyceride-glucose index,TyG)、高血壓、糖尿病、血脂異常、抑郁。高血壓定義為被醫(yī)生診斷的高血壓,或近期使用抗高血壓藥物,或收縮壓≥140 mmHg,或舒張壓≥90 mmHg。血脂異常定義為被醫(yī)生診斷的血脂異常,或近期服用調(diào)脂藥物。抑郁情況使用流行病學(xué)調(diào)查中心抑郁量表(the Center for Epidemiologic Studies Depression Scale,CES-D)簡(jiǎn)表測(cè)量,總分≥10分評(píng)為抑郁[12-13]。根據(jù)公式計(jì)算TyG=ln[三酰甘油(mmol/L)×空腹血糖(mmol/L)/2]。
1.3統(tǒng)計(jì)學(xué)處理
采用R 4.3.0軟件進(jìn)行統(tǒng)計(jì)分析。定量資料若符合正態(tài)分布以均數(shù)±標(biāo)準(zhǔn)差(x±s)表示,采用t檢驗(yàn),非正態(tài)分布則用中位數(shù)(四分位數(shù)間距)[M(P25,P75)]表示,采用Wilcoxon秩和檢驗(yàn);定性資料以例數(shù)、百分比(%)表示,采用χ2檢驗(yàn)。采用多因素Logistic回歸分析午休時(shí)間、午休長(zhǎng)短、夜間睡眠時(shí)間、夜間睡眠長(zhǎng)短、睡眠質(zhì)量與心血管代謝性共病發(fā)病風(fēng)險(xiǎn)的關(guān)聯(lián),構(gòu)建4個(gè)模型調(diào)整協(xié)變量。根據(jù)高血壓、血脂異常、糖尿病、抑郁、心臟病進(jìn)行分層,分析午休長(zhǎng)短與心血管代謝性共病發(fā)病風(fēng)險(xiǎn)的關(guān)聯(lián)是否受到分層因素的影響。以P<0.05為差異有統(tǒng)計(jì)學(xué)意義。
2結(jié)果
2.1研究對(duì)象篩選
2011年基線期包括17 706例參與者,根據(jù)納入標(biāo)準(zhǔn)篩選,最終納入6 829例參與者,篩選流程見(jiàn)圖1。
2.2研究對(duì)象的基本特征
共納入6 829例參與者,基線期平均夜間睡眠時(shí)間為6.3 h,平均午休時(shí)間為32.4 min。2015年發(fā)生心血管代謝性共病的病人為284例(4.2%),心血管代謝性共病發(fā)病與午休時(shí)間、睡眠質(zhì)量、年齡、飲酒情況、收縮壓、舒張壓、BMI、空腹血糖、HbA1c、三酰甘油、高密度脂蛋白膽固醇、TyG、CRP、高血壓、血脂異常、抑郁有關(guān)(P<0.05)。詳見(jiàn)表1。
2.3午休時(shí)間、午休長(zhǎng)短與心血管代謝性共病發(fā)病的關(guān)系
模型1為調(diào)整年齡、性別、婚姻狀況、文化水平、吸煙情況和飲酒情況、BMI、收縮壓、空腹血糖、HbA1c、總膽固醇、三酰甘油、高密度脂蛋白膽固醇酯、低密度脂蛋白膽固醇、CRP、血肌酐、TyG、高血壓、血脂異常、糖尿病、抑郁;模型2為在模型1的基礎(chǔ)上調(diào)整夜間睡眠時(shí)間。經(jīng)模型2調(diào)整,結(jié)果顯示,午休時(shí)間與心血管代謝性共病的發(fā)病風(fēng)險(xiǎn)有關(guān)(P=0.012),詳見(jiàn)表2。與不午休(0 min)相比,長(zhǎng)午休(≥30 min)發(fā)生心血管代謝性共病的發(fā)病風(fēng)險(xiǎn)明顯升高[OR=1.40,P=0.012];與短午休(<30 min)相比,不午休(0 min)或長(zhǎng)午休(≥30 min)的心血管代謝性共病發(fā)病風(fēng)險(xiǎn)無(wú)明顯差異。詳見(jiàn)表3。
2.4夜間睡眠時(shí)間、夜間睡眠長(zhǎng)短與心血管代謝性共病發(fā)病的關(guān)系
經(jīng)模型3調(diào)整,結(jié)果顯示,夜間睡眠時(shí)間與心血管代謝性共病發(fā)病風(fēng)險(xiǎn)無(wú)關(guān)(P=0.559);與夜間正常睡眠(7~9 h)相比,夜間長(zhǎng)睡眠(>9 h)的心血管代謝性共病發(fā)病風(fēng)險(xiǎn)降低(OR=0.36,P=0.028)。詳見(jiàn)表4、表5。
2.5睡眠質(zhì)量與心血管代謝性共病發(fā)病的關(guān)系
經(jīng)模型4調(diào)整,不同睡眠質(zhì)量與心血管代謝性共病的發(fā)病風(fēng)險(xiǎn)無(wú)關(guān)(P>0.05)。詳見(jiàn)表6。
2.6午休長(zhǎng)短與心血管代謝性共病發(fā)病的亞組分析結(jié)果
經(jīng)模型2調(diào)整,亞組分析結(jié)果顯示,與不午休相比,高血壓、血脂異常、非糖尿病人群長(zhǎng)午休(≥30 min)的心血管代謝性共病風(fēng)險(xiǎn)增加(P<0.05)。詳見(jiàn)表7。
3討論
常見(jiàn)的心血管代謝性疾病包括糖尿病、腦卒中、心血管病、高血壓、高脂血癥等,本研究將心血管代謝性共病定義為患有糖尿病、腦卒中、心血管疾病中2種或3種疾病,是最常見(jiàn)的共病模式之一,相關(guān)研究表明,該心血管代謝性共病模式與老年人的高死亡率有關(guān)[5]。既往研究發(fā)現(xiàn),健康的睡眠模式(早期時(shí)間型、睡眠7~8 h/d、無(wú)失眠、無(wú)打鼾和白天無(wú)頻繁過(guò)度嗜睡)對(duì)降低40~69歲高血壓人群的心血管代謝性共病發(fā)病風(fēng)險(xiǎn)有益[14]。午休是常見(jiàn)的作息方式,能夠幫助人們清醒并改善認(rèn)知能力[15]。但是,頻繁午休或午休時(shí)間過(guò)長(zhǎng)會(huì)增加冠狀動(dòng)脈粥樣硬化性心臟病的發(fā)病風(fēng)險(xiǎn)[16]。本研究單獨(dú)分析午休長(zhǎng)短與心血管代謝性共病風(fēng)險(xiǎn)的關(guān)聯(lián),結(jié)果顯示,與不午休(0 min)相比,長(zhǎng)午休(≥30 min)的心血管代謝性共病風(fēng)險(xiǎn)增加,短午休(<30 min)的心血管代謝性共病風(fēng)險(xiǎn)無(wú)明顯差異。有研究表明,習(xí)慣性打鼾者在白天更容易嗜睡,睡眠時(shí)間更長(zhǎng)[17]。而白天嗜睡與新發(fā)卒中和心血管事件有關(guān),尤其在老年人群體中[18]。午休通過(guò)影響睡眠-覺(jué)醒周期的穩(wěn)態(tài)改變機(jī)體的晝夜節(jié)律[19-20],晝夜節(jié)律紊亂會(huì)影響血管重塑導(dǎo)致血管老化相關(guān)的心血管事件發(fā)生[21-22],其機(jī)制與調(diào)控芳香烴受體核轉(zhuǎn)位因子樣蛋白(BMAL1)、時(shí)鐘調(diào)節(jié)基因(CLOCK)和神經(jīng)元 PAS 結(jié)構(gòu)域蛋白 2(NPAS2)等基因的轉(zhuǎn)錄和翻譯過(guò)程以調(diào)節(jié)心臟代謝、影響機(jī)體的內(nèi)皮功能、血栓形成、血壓和心率有關(guān)[23-24]。本研究進(jìn)一步的亞組分析結(jié)果顯示,與不午休相比,長(zhǎng)午休(≥30 min)高血壓、血脂異常、非糖尿病人群的心血管代謝性共病發(fā)病風(fēng)險(xiǎn)升高。研究表明,肥胖、高血壓都是心血管代謝性共病的危險(xiǎn)因素,午休過(guò)長(zhǎng)會(huì)擾亂睡眠周期,影響皮質(zhì)醇等激素的正常分泌,導(dǎo)致糖脂代謝紊亂,從而增加心血管代謝性共病的發(fā)病風(fēng)險(xiǎn)[9,25-26]。
本研究發(fā)現(xiàn),與夜間正常睡眠時(shí)間(7~9 h)相比,夜間短睡眠(<7 h)并未增加心血管代謝性共病的發(fā)病風(fēng)險(xiǎn)。這與既往研究的結(jié)果不同。有研究認(rèn)為睡眠時(shí)間不足與心血管代謝性共病風(fēng)險(xiǎn)升高有關(guān),當(dāng)女性夜間睡眠時(shí)間不足5 h時(shí),心血管代謝性共病的發(fā)病風(fēng)險(xiǎn)較高[9]。還有研究通過(guò)分析夜班工人的睡眠時(shí)間,發(fā)現(xiàn)較高的夜班頻率(10次/月)可能會(huì)增加高血壓病人發(fā)生心血管代謝性共病的風(fēng)險(xiǎn)[27]。目前,睡眠與心血管代謝性疾病之間的關(guān)聯(lián)機(jī)制尚不明確。睡眠時(shí)間縮短可能與內(nèi)分泌失調(diào)有關(guān),睡眠不足可以減少睪丸激素、褪黑激素等激素分泌,增加生長(zhǎng)素的水平以影響機(jī)體代謝功能,從而增加心血管疾病的風(fēng)險(xiǎn)[28-32]。本研究還發(fā)現(xiàn),與夜間正常睡眠時(shí)間(7~9 h)相比,夜間長(zhǎng)睡眠(>9 h)人群發(fā)生心血管代謝性共病的風(fēng)險(xiǎn)降低,這說(shuō)明夜間睡眠時(shí)間延長(zhǎng)可能與心血管代謝性共病風(fēng)險(xiǎn)降低有關(guān)。但也有研究認(rèn)為,隨著睡眠時(shí)間的增加,全因死亡、冠心病和卒中的風(fēng)險(xiǎn)也隨之增加[33]。本研究納入的夜間長(zhǎng)睡眠(>9 h)例數(shù)較少(為275例),研究結(jié)果可能會(huì)產(chǎn)生偏倚,因此需要更多的臨床數(shù)據(jù)驗(yàn)證夜間長(zhǎng)睡眠對(duì)心血管代謝性共病風(fēng)險(xiǎn)的影響。
本研究的創(chuàng)新性:首先,本研究首次關(guān)注午休時(shí)間、午休長(zhǎng)短對(duì)老年人心血管代謝性共病發(fā)病風(fēng)險(xiǎn)的影響。其次,CHARLS研究采用多階段抽樣方法調(diào)查全國(guó)中老年人的健康數(shù)據(jù)與其他數(shù)據(jù),整個(gè)抽樣過(guò)程具有隨機(jī)性。此外,本研究考慮到所有可能影響心血管代謝性共病發(fā)病的其他危險(xiǎn)因素,如抑郁、BMI、TyG等指標(biāo),并通過(guò)構(gòu)建模型1~4調(diào)整協(xié)變量保證研究結(jié)果的準(zhǔn)確性。但是,本研究還存在一定局限性:首先,盡管本研究已經(jīng)調(diào)整多個(gè)混雜因素,但不可避免仍存在一些殘余混雜和未測(cè)量的混雜因素對(duì)研究結(jié)果產(chǎn)生影響。其次,本研究結(jié)果僅適用60歲以上的老年人,不一定適用于其他年齡階段的人群。再次,本研究在分析夜間睡眠長(zhǎng)短與心血管代謝性共病風(fēng)險(xiǎn)的關(guān)系時(shí),因納入的夜間長(zhǎng)睡眠例數(shù)較少,該部分研究結(jié)果可能存在偏倚風(fēng)險(xiǎn)。
4結(jié)論
在60歲以上的人群中,長(zhǎng)午休(≥30 min)會(huì)增加心血管代謝性共病風(fēng)險(xiǎn);夜間長(zhǎng)睡眠(>9 h)可能會(huì)降低心血管代謝性共病風(fēng)險(xiǎn),但未來(lái)需要更多的相關(guān)臨床研究以提供循證醫(yī)學(xué)證據(jù)。
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(收稿日期:2024-03-06)
(本文編輯郭懷印)