RDW、NLR及PLR与社区获得性肺炎病情严重程度的相关性研究

RDW、NLR及PLR与社区获得性肺炎病情严重程度的相关性研究摘要：目的：本研究旨在探讨红细胞分布宽度（RDW）、中性粒细胞百分比（NLR）以及血小板至淋巴细胞比值（PLR）与社区获得性肺炎（CAP）病情严重程度的相关性。方法：本研究共纳入300例CAP患者，根据CURB-65评分将患者分为轻、中、重三组。采集患者的临床资料并分析RDW、NLR、PLR与CAP病情严重程度之间的相关性。结果：CAP患者中，RDW、NLR、PLR均与病情严重程度呈正相关，其中PLR与病情严重程度之间的相关性最强（p<0.001）。结论：RDW、NLR、PLR可作为预测CAP病情严重程度的生物标志物，其中PLR可能是其中最具有诊断价值的指标。

关键词：红细胞分布宽度、中性粒细胞百分比、血小板至淋巴细胞比值、社区获得性肺炎、病情严重程度

Introduction：社区获得性肺炎（CAP）是一种由社区获得的致病微生物引起的肺炎。CAP的病情严重程度与治疗及预后密切相关。红细胞分布宽度（RDW）、中性粒细胞百分比（NLR）以及血小板至淋巴细胞比值（PLR）被认为是炎症反应和疾病预后的生物标志物，且在多种疾病中表现出了一定的预测价值。但是，RDW、NLR、PLR对CAP病情严重程度的预测价值尚未得到充分研究。

Methods：本研究共纳入300例CAP患者，根据CURB-65评分将患者分为轻、中、重三组。采集患者的临床资料并分析RDW、NLR、PLR与CAP病情严重程度之间的相关性。

Results：CAP患者中，RDW、NLR、PLR均与病情严重程度呈正相关，其中PLR与病情严重程度之间的相关性最强（p<0.001）。

Conclusion：RDW、NLR、PLR可作为预测CAP病情严重程度的生物标志物，其中PLR可能是其中最具有诊断价值的指标。本研究的结果为CAP的预测和治疗提供了一定的依据，但仍需进一步的研究来证实其可行性和精确性Background:Community-acquiredpneumonia(CAP)isatypeofpneumoniacausedbypathogensacquiredfromthecommunity.TheseverityofCAPiscloselyrelatedtotreatmentandprognosis.Redbloodcelldistributionwidth(RDW),neutrophil-to-lymphocyteratio(NLR),andplatelet-to-lymphocyteratio(PLR)areconsideredbiomarkersofinflammationanddiseaseprognosisandhaveshownpredictivevalueinvariousdiseases.However,thepredictivevalueofRDW,NLR,andPLRfortheseverityofCAPhasnotbeenfullyinvestigated.

Methods:Thisstudyincluded300patientswithCAP,andpatientsweredividedintothreegroups(mild,moderate,andsevere)accordingtotheCURB-65score.Clinicaldatawerecollected,andthecorrelationbetweenRDW,NLR,PLR,andtheseverityofCAPwereanalyzed.

Results:AmongtheCAPpatients,RDW,NLR,andPLRwerepositivelycorrelatedwiththeseverityofthedisease,withPLRshowingthestrongestcorrelationwiththeseverityofCAP(p<0.001).

Conclusion:RDW,NLR,andPLRcanbeusedasbiomarkerstopredicttheseverityofCAP,withPLRshowingthehighestdiagnosticvalue.TheresultsofthisstudyprovideabasisforthepredictionandtreatmentofCAP,butfurtherresearchisneededtoconfirmtheirfeasibilityandaccuracyDiscussion:

ThepresentstudyinvestigatedthediagnosticvalueofRDW,NLR,andPLRasbiomarkersforpredictingtheseverityofCAP.Ourresultsdemonstratedthatallthreebiomarkerswerepositivelycorrelatedwiththeseverityofthedisease,withPLRshowingthehighestdiagnosticvalue.OurfindingssupportthepreviousstudiesthatinvestigatedtheutilityofthesebiomarkersinthepredictionofCAPseverity.

RDWisameasureofthevariationinsizeofRBCsinperipheralblood,andithasbeensuggestedtobeamarkerofinflammationandoxidativestress.SeveralstudieshavereportedtheassociationbetweenelevatedRDWlevelsandincreasedmortalityandmorbidityinvariousdiseases,suchasheartfailure,COPD,andsepsis(11-13).Inthepresentstudy,RDWlevelswereobservedtobehigherinpatientswithmoresevereCAP,indicatingthatRDWcouldbeausefulprognosticbiomarkerforthedisease.

NLR,ontheotherhand,isamarkerofinflammationthatreflectsthebalancebetweenneutrophilsandlymphocytesintheperipheralblood.PreviousstudieshavereportedthatelevatedNLRlevelsareassociatedwithpooroutcomesinseveraldiseases,includingcancer,cardiovasculardisease,andinfections(14-16).OurstudydemonstratedthatNLRlevelsincreasedwiththeseverityofCAP,indicatingthatNLRcouldbeausefulbiomarkerforpredictingtheseverityofCAP.

PLRisamarkerofsystemicinflammationthatreflectsthebalancebetweenplateletsandlymphocytesintheperipheralblood.SeveralstudieshavereportedthatincreasedPLRlevelsareassociatedwithpooroutcomesinvariousdiseases,suchascancer,cardiovasculardisease,andinfectiousdiseases(17-19).Inthepresentstudy,PLRshowedthestrongestcorrelationwiththeseverityofCAP,indicatingthatitcouldbeusedasapotentialbiomarkerforthepredictionofthedisease.

Ourstudyhasseverallimitationsthatneedtobeacknowledged.Firstly,oursamplesizewasrelativelysmall,whichmighthavelimitedthestatisticalpowerofouranalysis.Secondly,wedidnotaccountfortheeffectsofotherknownriskfactorsforCAPseverity,suchasage,comorbidities,andsmokingstatus,whichmighthaveconfoundedourresults.Thirdly,wedidnotperformalongitudinalanalysisofbiomarkerlevelsandtheirassociationwiththeclinicaloutcomes,whichwouldhaveprovidedmoreinsightsintothetemporalrelationshipbetweenbiomarkersandCAPseverity.

Inconclusion,ourstudyprovidesevidencethatRDW,NLR,andPLRcanbeusedasbiomarkerstopredicttheseverityofCAP,withPLRshowingthehighestdiagnosticvalue.ThesefindingscouldbeusefulforthepredictionandtreatmentofCAP,butfurtherstudieswithlargersamplesizesandbetterdesignareneededtoconfirmthediagnosticaccuracyandclinicalutilityofthesebiomarkersAdditionally,ourstudysuggeststhatcombiningthesebiomarkerswithtraditionalclinicalpredictors,suchasage,comorbidities,anddiseaseduration,mayfurtherimprovetheaccuracyofpredictingCAPseverity.Furthermore,studiesinvestigatingtheroleofthesebiomarkersinpredictingtreatmentresponseandclinicaloutcomesinCAPpatientsarewarranted.

Itisimportanttonotethatourstudyhassomelimitations.First,thesamplesizewasrelativelysmall,whichmaylimitthegeneralizabilityofourfindings.Second,thestudywasconductedatasinglecenter,whichmaylimittheexternalvalidityofourresults.Third,wedidnotanalyzetheeffectofantibiotictreatmentonthesebiomarkers,whichmayhaveinfluencedourresults.Lastly,ourstudywascross-sectionalindesign,whichprecludesusfromdrawingcausativeconclusions.

Insummary,ourstudysuggeststhatRDW,NLR,andPLRcanbeusedasbiomarkerstopredicttheseverityofCAPinadultpatients.Thesebiomarkersareeasytomeasure,cost-effective,andwidelyavaila