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      肝硬化門脈性肺動(dòng)脈高壓危險(xiǎn)因素分析及預(yù)測(cè)模型構(gòu)建

      2024-12-31 00:00:00匡競(jìng)滕雙芩申彤彤閆怡然王瑋申川趙彩彥
      臨床肝膽病雜志 2024年9期
      關(guān)鍵詞:列線圖肺動(dòng)脈高壓危險(xiǎn)因素

      通信作者:王瑋,wangwei_1211@126.com(ORCID:0000-0002-3737-1492)

      摘要:目的探索肝硬化門脈性肺動(dòng)脈高壓(POPH)的危險(xiǎn)因素,構(gòu)建無(wú)創(chuàng)化預(yù)測(cè)模型。方法回顧性分析2013年1月—2022年8月在河北醫(yī)科大學(xué)第三醫(yī)院住院的310例肝硬化門靜脈高壓患者的臨床資料,依據(jù)超聲估測(cè)的肺動(dòng)脈收縮壓是否≥40 mmHg分為POPH組(n=31)和非POPH組(n=279)。符合正態(tài)分布的計(jì)量資料2組間比較采用成組t檢驗(yàn),不符合正態(tài)分布的計(jì)量資料2組間比較采用Mann-Whitney U檢驗(yàn);計(jì)數(shù)資料2組間比較采用χ2檢驗(yàn)或Fisher確切概率法。應(yīng)用二元Logistic回歸分析篩選獨(dú)立危險(xiǎn)因素,并構(gòu)建列線圖預(yù)測(cè)模型,采用Bootstrap重抽樣法進(jìn)行內(nèi)部驗(yàn)證,用C指數(shù)和校準(zhǔn)曲線評(píng)價(jià)模型區(qū)分度和一致性。用rms包繪制列線圖。結(jié)果與非POPH組相比,POPH組平均年齡偏小,女性、肝性腦病、Child-Pugh C級(jí)占比較高,DBil、MELD評(píng)分、ALBI評(píng)分、國(guó)際標(biāo)準(zhǔn)化比值、凝血酶原時(shí)間、FIB-4指數(shù)、LOK評(píng)分、Forns指數(shù)較高,但Alb、ALT、GGT、血紅蛋白、總膽固醇、甘油三酯水平較低,差異均具有統(tǒng)計(jì)學(xué)意義(P值均lt;0.05)。多因素分析結(jié)果顯示,性別(OR=0.172,95%CI:0.064~0.462,Plt;0.001)、年齡(OR=0.944,95%CI:0.901~0.989,P=0.016)、ALBI評(píng)分(OR=3.091,95%CI:1.100~8.687,P=0.032)和肝性腦?。∣R=3.466,95%CI:1.331~9.031,P=0.011)是POPH的獨(dú)立影響因素?;谝陨衔kU(xiǎn)因素建立的肝硬化POPH預(yù)測(cè)模型的C指數(shù)為0.796(95%CI:0.701~0.890),提示模型區(qū)分度良好,校準(zhǔn)曲線顯示模型校準(zhǔn)能力較好,提示模型具有一定預(yù)測(cè)效能。結(jié)論年輕女性、ALBI評(píng)分升高、合并肝性腦病是肝硬化患者發(fā)生POPH的獨(dú)立危險(xiǎn)因素,基于上述因素建立的預(yù)測(cè)模型具有一定的臨床應(yīng)用價(jià)值。

      關(guān)鍵詞:肝硬化;高血壓,門靜脈;肺動(dòng)脈高壓;危險(xiǎn)因素;列線圖

      Risk factors for portopulmonary hypertension in liver cirrhosis and construction of a predictive model

      KUANG Jing,TENG Shuangqin,SHEN Tongtong,YAN Yiran,WANG Wei,SHEN Chuan,ZHAO Caiyan.(Department of Infectious Diseases and Hepatology,The Third Affiliated Hospital of Hebei Medical University,Shijiazhuang 050051,China)

      Corresponding author:WANG Wei,wangwei_1211@126.com(ORCID:0000-0002-3737-1492)

      Abstract:Objective To investigate the risk factors for portopulmonary hypertension(POPH)in liver cirrhosis,and to construct a noninvasive predictive model.Methods A retrospective analysis was performed for the clinical data of 310 cirrhotic patients with portal hypertension who were hospitalized in The Third Affiliated Hospital of Hebei Medical University from January 2013 to August 2022,and according to whether pulmonary artery systolic pressure was≥40 mmHg on ultrasound,the patients were divided into POPH group with 31 patients and non-POPH group with 279 patients.The independent-samples t test was used for comparison of normally distributed continuous data between two groups,and the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups;the chi-square test or the Fisher’s exact test was used for comparison of categorical data between two groups.A binary Logistic regression analysis was used to determine the independent risk factors for POPH,and a nomogram prediction model was constructed.The Bootstrap resampling method was used for internal validation,and C-index and calibration curve were used to assess the discriminatory ability and consistency of the model.The rms package was used to plot the nomogram.Results Compared with the non-POPH group,the POPH group had a significantly younger age,a significantly higher proportion of women or patients with hepatic encephalopathy or Child-Pugh class C disease,and significantly higher levels of direct bilirubin,Model for End-Stage Liver Disease score,albumin-bilirubin(ALBI)score,international normalized ratio,prothrombin time,F(xiàn)IB-4 index,LOK score,and Forns index,as well as significantly lower levels of serum albumin,alanine aminotransferase,gamma-glutamyl transpeptidase,hemoglobin,total cholesterol,and triglycerides(all Plt;0.05).The multivariate analysis showed that sex(odds ratio[OR]=0.172,95%confidence interval[CI]:0.064—0.462,Plt;0.001),age(OR=0.944,95%CI:0.901—0.989,P=0.016),ALBI score(OR=3.091,95%CI:1.100—8.687,P=0.032),and hepatic encephalopathy(OR=3.466,95%CI:1.331—9.031,P=0.011)were independent risk factors for POPH.A predictive model for POPH in liver cirrhosis was established based on the above independent risk factors,with a C-index of 0.796(95%CI:0.701—0.890),suggesting that the model had good discriminatory ability,and the calibration curve showed that the model had good calibration ability,suggesting that the model had certain predictive efficacy.Conclusion Young female individuals,elevated ALBI score,and comorbidity with hepatic encephalopathy are independent risk factors for POPH in patients with liver cirrhosis,and the predictive model established based on these factors has a certain clinical application value.

      Key words:Liver Cirrhosis;Hypertension,Portal;Pulmonary Arterial Hypertension;Risk Factors;Nomograms

      門脈性肺動(dòng)脈高壓(portopulmonary hypertension,POPH)是指在門靜脈高壓基礎(chǔ)上發(fā)生的肺動(dòng)脈高壓(pulmonary artery hypertension,PAH),最常見(jiàn)于各種原因所致的肝炎肝硬化。該病在人群中患病率低,流行數(shù)據(jù)缺乏。據(jù)統(tǒng)計(jì),在晚期肝病等待肝移植的患者中POPH占5.3%~8.5%[1],而截至2017年,全球約有1 060萬(wàn)失代償期肝硬化患者[2],若按此比例,世界范圍內(nèi)將有大量POPH患者。POPH的危險(xiǎn)因素存在一定爭(zhēng)議,若能明確危險(xiǎn)因素,將有助于降低其發(fā)病率和死亡率。此外,該病臨床表現(xiàn)缺乏特異性,診斷需靠有創(chuàng)的右心導(dǎo)管檢查(right heart catheterization,RHC),臨床上多用經(jīng)胸多普勒超聲心動(dòng)圖(transthoracic doppler echocardiography,TDE)篩查,但準(zhǔn)確性不及RHC。POPH治療困難,肝移植是最有效的方法。然而,PAH嚴(yán)重程度與肝移植成功率密切相關(guān),肝移植前肺血管阻力≥1.6 Woods時(shí),死亡風(fēng)險(xiǎn)增加1倍以上,當(dāng)平均肺動(dòng)脈壓≥50 mmHg時(shí),病死率高達(dá)100%[3]??梢?jiàn),POPH的管理仍面臨巨大挑戰(zhàn)。因此,本研究通過(guò)探究該病的危險(xiǎn)因素,建立無(wú)創(chuàng)化預(yù)測(cè)模型,有助于臨床早期識(shí)別POPH,為早期肝移植創(chuàng)造機(jī)會(huì),提高患者存活率。

      1資料與方法

      1.1研究對(duì)象本研究為回顧性病例對(duì)照研究,選取2013年1月—2022年8月在本院住院的肝硬化門靜脈高壓患者,根據(jù)TDE結(jié)果分為POPH組和非POPH組。

      1.2納入標(biāo)準(zhǔn)(1)依據(jù)2019年《肝硬化診治指南》[4],診斷符合肝硬化門靜脈高壓;(2)行TDE檢查,參考2009年美國(guó)心臟病學(xué)會(huì)專家共識(shí)[5],TDE估測(cè)的肺動(dòng)脈收縮壓≥40 mmHg診斷為PAH。

      1.3排除標(biāo)準(zhǔn)(1)排除非肝硬化導(dǎo)致的門靜脈高壓,如肝小靜脈閉塞癥、布加綜合征等;(2)排除肺源性、心源性、結(jié)締組織病等可致PAH的疾??;(3)排除合并感染、休克、肝移植術(shù)后、年齡lt;18周歲、臨床資料不完整的患者。1.4觀察指標(biāo)(1)人口學(xué)資料:性別、年齡等;(2)實(shí)驗(yàn)室檢查:血常規(guī)、血生化、凝血指標(biāo);(3)TDE結(jié)果;(4)計(jì)算肝功能相關(guān)評(píng)分:依據(jù)2019年《肝硬化診治指南》[4]及相關(guān)文獻(xiàn)[6],計(jì)算Child-Pugh分級(jí),終末期肝病模型(MELD)評(píng)分,ALBI評(píng)分=0.66×log10[TBil(μmol/L)]-0.085×[Alb(g/L)]。

      1.5門靜脈高壓和肝纖維化預(yù)測(cè)評(píng)分參考國(guó)內(nèi)外相關(guān)文獻(xiàn)[7-8]:APRI=(AST/正常值上限×100)/血小板計(jì)數(shù);LOK評(píng)分=?5.56-0.008 9×血小板計(jì)數(shù)+1.26×(AST/ALT)+5.27×國(guó)際標(biāo)準(zhǔn)化比值;FIB-4指數(shù)=年齡×AST/(血小板計(jì)數(shù)×);S指數(shù)=1 000×GGT/(血小板計(jì)數(shù)×Alb2);Forns指數(shù)=7.811-3.131×ln(血小板計(jì)數(shù))+0.781×ln(GGT)+3.467×ln(年齡)-0.014×(總膽固醇)。

      1.6統(tǒng)計(jì)學(xué)方法使用SPSS 26.0軟件分析數(shù)據(jù)。符合正態(tài)分布的計(jì)量資料以±s表示,2組間比較采用成組t檢驗(yàn);不符合正態(tài)分布的計(jì)量資料以M(P25~P75)表示,2組間比較采用Mann-Whitney U秩和檢驗(yàn)。計(jì)數(shù)資料2組間比較采用χ2檢驗(yàn)或Fisher確切概率法。篩選Plt;0.05的因素,并進(jìn)行多重共線性診斷,將不存在多重共線性的指標(biāo)進(jìn)行二元Logistic回歸分析,篩選獨(dú)立危險(xiǎn)因素,基于獨(dú)立危險(xiǎn)因素構(gòu)建肝硬化POPH預(yù)測(cè)模型。在R 4.2.2軟件中用Bootstrap法進(jìn)行內(nèi)部驗(yàn)證,根據(jù)C指數(shù)和校準(zhǔn)曲線評(píng)價(jià)模型區(qū)分度和一致性。利用rms包繪制列線圖。Plt;0.05為差異有統(tǒng)計(jì)學(xué)意義。

      2結(jié)果

      2.1肝硬化門靜脈高壓患者的一般臨床特征共篩選肝硬化門靜脈高壓患者2 000例,符合入組條件者310例,男198例(63.9%),女112例(36.1%),平均年齡(55.77±9.87)歲。其中POPH組31例,平均年齡(52.39±13.00)歲,肺動(dòng)脈收縮壓中位數(shù)為47 mmHg;非POPH組279例,平均年齡(56.14±9.41)歲。與非POPH組相比,POPH組平均年齡偏小,女性、肝性腦病、Child-Pugh C級(jí)占比較高,DBil、MELD評(píng)分、ALBI評(píng)分、國(guó)際標(biāo)準(zhǔn)化比值、凝血酶原時(shí)間、FIB-4指數(shù)、LOK評(píng)分、Forns指數(shù)較高,但Alb、ALT、GGT、血紅蛋白、總膽固醇、甘油三酯水平較低,差異均具有統(tǒng)計(jì)學(xué)意義(P值均lt;0.05),提示POPH組肝功能、凝血功能較差。兩組患者的肝病病因相似,以慢性乙型肝炎最多見(jiàn)(表1)。

      2.2肝硬化POPH多因素分析結(jié)果將單因素分析Plt;0.05的因素納入多因素分析,篩選策略選擇Enter法,由于Alb與ALBI評(píng)分存在多重共線性(VIFgt;10),故舍棄Alb,結(jié)果顯示性別、年齡、ALBI評(píng)分和肝性腦病是肝硬化POPH的獨(dú)立影響因素(P值均lt;0.05)(表2)。

      2.3肝硬化POPH預(yù)測(cè)模型的構(gòu)建、驗(yàn)證與評(píng)價(jià)基于性別、年齡、ALBI評(píng)分、肝性腦病4個(gè)獨(dú)立影響因素構(gòu)建預(yù)測(cè)模型,利用Bootstrap法進(jìn)行內(nèi)部驗(yàn)證,結(jié)果顯示C指數(shù)為0.796(95%CI:0.701~0.890),提示預(yù)測(cè)模型區(qū)分度良好。校準(zhǔn)曲線如圖1所示,圖中校準(zhǔn)曲線與理想標(biāo)準(zhǔn)曲線較為接近,提示預(yù)測(cè)模型校準(zhǔn)度較好。同樣,該模型經(jīng)Hosmer-Lemeshow擬合優(yōu)度檢驗(yàn),χ2=9.748,P=0.283,說(shuō)明模型擬合程度高,符合校準(zhǔn)曲線圖中的結(jié)果。

      2.4肝硬化POPH預(yù)測(cè)模型的可視化利用rms包繪制列線圖(圖2),圖中的“Points”為單項(xiàng)得分,表示自變量在不同取值下的得分,所有自變量得分總和即為圖中“Total Points”,據(jù)此可對(duì)應(yīng)獲取發(fā)生POPH的概率。

      3討論

      既往研究[9-10]認(rèn)為年齡小、女性、自身免疫性肝炎的患者更易患POPH,本研究發(fā)現(xiàn)年齡小、女性是肝硬化POPH的危險(xiǎn)因素,尚未發(fā)現(xiàn)與自身免疫性肝病相關(guān),這可能與樣本量大小和分布有關(guān)。年齡小、女性患者POPH風(fēng)險(xiǎn)增加與雌激素水平及免疫紊亂有關(guān)。年輕女性雌激素水平較高,且慢性肝病時(shí)雌激素滅活減少,由此形成的高雌激素水平將增加自身免疫性疾病發(fā)?。?1],從而增加POPH風(fēng)險(xiǎn)。此外,編碼雌激素受體1基因多態(tài)性[12]、雌激素及其代謝物水平均與POPH風(fēng)險(xiǎn)相關(guān)[13]。

      目前,大多數(shù)研究[9,14]認(rèn)為POPH的發(fā)生與肝功能嚴(yán)重程度(Child-Pugh評(píng)分、MELD評(píng)分)無(wú)關(guān)。但近期一項(xiàng)研究[15]發(fā)現(xiàn)ALBI評(píng)分、MELD評(píng)分均與POPH的嚴(yán)重程度呈正相關(guān)。本研究中POPH與ALBI評(píng)分獨(dú)立相關(guān),尚未發(fā)現(xiàn)與MELD評(píng)分和Child-Pugh分級(jí)獨(dú)立相關(guān),但POPH組MELD評(píng)分升高、Child-Pugh C級(jí)占比增加,因此,不同的肝功能評(píng)分對(duì)POPH的預(yù)測(cè)能力不同。ALBI評(píng)分基于Alb和膽紅素,最早用于評(píng)估肝癌患者的肝功能和預(yù)后[16],近年發(fā)現(xiàn)其對(duì)慢性丙型肝炎肝纖維化分期和預(yù)后[17]、原發(fā)性膽汁性膽管炎預(yù)后[18]、慢性乙型肝炎預(yù)后[19]等均具有較好的預(yù)測(cè)能力。與Child-Pugh分級(jí)相比,ALBI評(píng)分消除了主觀因素對(duì)腹水、肝性腦病判定的影響,能更客觀地評(píng)估肝功能[20],而MELD評(píng)分主要用于評(píng)估晚期慢性肝病患者。Alb具有抗氧化的功能,慢性肝病患者Alb下降、膽紅素升高會(huì)降低抗氧化能力,激活芳香烴受體,從而促進(jìn)POPH的發(fā)生[15]。

      本研究還發(fā)現(xiàn)肝性腦病是肝硬化POPH的獨(dú)立危險(xiǎn)因素(OR=3.466,P=0.011),在列線圖中具有較高權(quán)重。和健康對(duì)照組、無(wú)肝性腦病的肝硬化患者相比,肝性腦病患者腸道微生物組明顯改變[21],內(nèi)毒素水平明顯升高[22],腸道微生物的代謝產(chǎn)物變化如短鏈脂肪酸減少、三甲胺-N-氧化物和血清素增加等通過(guò)激活信號(hào)通路促進(jìn)肺血管炎癥和重塑,導(dǎo)致PAH的發(fā)生,長(zhǎng)期而嚴(yán)重的PAH可導(dǎo)致腸靜脈淤血,進(jìn)一步加重腸道菌群失調(diào),形成惡性循環(huán)。另外,在PAH動(dòng)物模型和患者中同樣觀察到腸道菌群改變,提示腸道菌群改變促進(jìn)PAH的發(fā)展[23]。因此,肝性腦病患者PAH風(fēng)險(xiǎn)增加。

      目前尚不清楚門靜脈高壓及肝硬化嚴(yán)重程度與POPH的關(guān)系,已開發(fā)出的APRI、FIB-4指數(shù)[24]、Forns指數(shù)、LOK評(píng)分[7]、S指數(shù)[8]等對(duì)門靜脈高壓和肝纖維化具有一定的預(yù)測(cè)能力,本研究探究了上述無(wú)創(chuàng)化評(píng)分與POPH的關(guān)系,差異無(wú)統(tǒng)計(jì)學(xué)意義,側(cè)面說(shuō)明門靜脈高壓和肝纖維化嚴(yán)重程度可能與POPH無(wú)關(guān)。

      POPH危險(xiǎn)因素不明確,無(wú)創(chuàng)化診斷困難,疾病發(fā)展累及心肺時(shí)死亡率高,預(yù)后差。因此,對(duì)于門靜脈高壓患者,尤其是年輕女性、ALBI評(píng)分高、合并肝性腦病的患者,POPH發(fā)生風(fēng)險(xiǎn)增加,應(yīng)積極改善肝功能,預(yù)防肝性腦病。此外,應(yīng)積極探索POPH更多的特異性指標(biāo),進(jìn)一步優(yōu)化預(yù)測(cè)模型,提高診斷效能,更好地服務(wù)于臨床。

      本研究具有一定的局限性:(1)PAH的診斷采用TDE,準(zhǔn)確性不及RHC,但由于RHC為有創(chuàng)性檢查,應(yīng)用較少,故TDE仍為首選方法。(2)由于POPH發(fā)病率低,研究納入例數(shù)較少,導(dǎo)致兩組人群例數(shù)相差較大,結(jié)果可能存在偏倚。(3)門靜脈高壓與PAH共存時(shí),POPH的診斷需結(jié)合RHC檢查等進(jìn)一步綜合評(píng)估,并除外心肺疾病的潛在病因,如特發(fā)性PAH。(4)該預(yù)測(cè)模型僅進(jìn)行內(nèi)部驗(yàn)證,未進(jìn)行外部驗(yàn)證,故模型推廣應(yīng)用受限。

      倫理學(xué)聲明:本研究于2023年4月27日經(jīng)由河北醫(yī)科大

      學(xué)第三醫(yī)院倫理委員會(huì)審查通過(guò),批號(hào):科2023-047-1。

      利益沖突聲明:本文不存在任何利益沖突。

      作者貢獻(xiàn)聲明:匡競(jìng)負(fù)責(zé)查閱文獻(xiàn),分析數(shù)據(jù),撰寫文章;滕雙芩、申彤彤、閆怡然負(fù)責(zé)查閱文獻(xiàn),收集數(shù)據(jù);王瑋負(fù)責(zé)論文修改及審校;申川、趙彩彥負(fù)責(zé)論文審校。

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      收稿日期:2023-12-31;錄用日期:2024-02-01

      本文編輯:劉曉紅

      引證本文:KUANG J, TENG SQ, SHEN TT, et al. Risk factors for portopulmonary hypertension in liver cirrhosis and construction of a predictive model[J]. J Clin Hepatol, 2024, 40(9): 1802- 1806.

      匡競(jìng), 滕雙芩, 申彤彤, 等 . 肝硬化門脈性肺動(dòng)脈高壓危險(xiǎn)因素分 析及預(yù)測(cè)模型構(gòu)建[J]. 臨床肝膽病雜志, 2024, 40(9): 1802- 1806.

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