9979JournalofClli:loseIntegrativeModle,,eSeptember2009,Vol.7,No.9889,2009(preferredReportingtemsforSystematieRevlewsandMetaAnalyses,pRISMA)}}:pRISMA(QualjtyofReportingofMetaAnalyses),oUoRoM,,,,27,,:RISMA,,preferredreportingitemsforsystematiereviewsandmetaanalyses:theRlsMAstatementpLoSMed.2009;6(7):e1000097.doi:10.1371/Journapmed.1000097,(eI:016428676;mail:jianPing_!@otmail.com)(973)(No.2006CB504602):PRISMADavidMoher2,AlessandroLiberati,.JenniferTetzlaff,DouglasG.Altman,ThePRISMAGroup1.()ttaw:MerhodsCentre()ttawaH()51ltalRee:rellInstirle,()ttawa()ntar,Can:la2.DepartrnentofEpidomiol()gyandCommunityModeine.aeultyofModiein,Univerityof()ttawa.()rt:lwa,()ntario.axlad:3.UnveritddiMolena0RcggloEmlla.Modena.Italy4.CentroC()ehraneItaliano.ItittltoRieereheFarmaeologieheMorioNegri,Ml:In.Italy5.CentreforSt:ltiIcinMedleine.Universityof()xfor({,()xf()rd,UnltedKingdom:;;PRISMAPreferredrePortingitemsforsystematicreviewsandmetaanalyses:thePRISMAstatement(Chineseedition)DavidMoher.AlessandroLiberati3,JenniferTetzlaff,DouglasG.Altmans,1.()ttawaMetl()dCntro.()tt:waHospitalRese:relInsritute()ttawa()ntario.Canada2.Dep:rtmentofEl;l:lolniologyaldCommunityMedlcine.FaeLlltyofMediein,Univerityofottawa.3.UniveritddiModen:,eReggioEmilia.M(den::,Italy4.CcntroCoehraneItalano.ItltutoRieerelleF;lrn,aeologiehcMarioNegri.Milan.It::ly5.Centref()rStaristiesinMedielne.Univorsityo()xford,()xford.Unite1KingdomThePRISMAGrouP)ttawa,()ntarlo,Canad-Keywords:systematlCreVleW;metaanalysls;PRISMA200997,J)tlrnalofhlneeIn:grativeModiellle,Septenlbor09,Vol.7.N).9(meta)2,3,,,,1987,Muirow4198519865,8,,,SackS83meta,623,83meta114,(mean)7.7,(tandarddeviation)2.7996,10,1996,meta,meta(QtlalityofReportingofMetaAnalyseS,Qu()R()M),meta,meta(PreferredReportingItemsforSystematieReviewsandMetaAnalyses,PRISMA),12PRISMAl|,|jJeseel,.,..,metaQUOROMPRIsMA,meta,,Cochrane,,(meta)Meta20056,293QU()ROM,:,;meta,(InternationalNetworkAgeneiesofHealthTeehnologyASseSSmenr,xNAHTA)(GuidelineSInternationalNetwork,GIN);QU()ROM,,PRxsMA(),,[1)[1,,PRISMA,,,n,,,5,[2,3,(InternationalCornmitteeofMediealJournalEditorS,ICMJE),5,7,,2009979JonalofChineseIntegratsveMedieineSeptembe:2009,vol.7No.93PRISMA))PRISMA27(lSl,Word,)(1,S1,Word,)meta,PRISMA,PRISMA,PRISMA,2,,,,PRISMA74QUOROMPRISMAPRISMAQUOROM,2,PRISMAQUOROM,,,,,,(),,,PRISMA5QU()ROM,QU()ROMPRISMAPRISMA,PRIsMA,PRISMA,PRISMAPRISMAPRISMAPRISMA,8,7300,,,,,,3:[33[3!_PRISMA,,,,,,meta,;8,PRISMA,,,PRISMAPRISMA,,PRISMA892200997,Joalof(hine,::grllveMedic,ne,sep:mberZ()9.vol.7,No.9lmetameta,1.lq11!1..1516(parleip:LntsilllerVe,to,Seomparlon.teon,es.tdydesign.Plc()s)5,().,(PIC()(),(,),,,meta)()(PIC()S),(),,(riskratio)(dlffereneeInmoan),meta,()(,meta),Ql1,.1,nq,||JJI|...........,.,(PIC()S),(12)(),(a),(b).meta,(15),(,mela.16),;()(),(,).27()2009979JournalofC}lifeel;:tegraziveModiir.5tn,be:2().vol.7.No.9893851,Word(0.08MBDOC),,doi:10.1371/Journalpmed1000097.5001Slmda,Word(0.04MBD()C),,doi:20.1371/iournal.pmed.1000()97.5002~}}ta)l2QUOROMPRISMAQU()R()Ml)RISMAQU()R()MPRISMA.PI15MA(PK()S().;61118(.QU()R()MPRISM,PRISMA(8).QU()ROM(12)(19)(1.(22)QU()R()MPRISMAPRISM3(2426)(27):8942009979Jo,rnalofChn11:tegraIvMe(llel,le,Septen,befZ)9.V(1.7.No.9IQUOROMPRISMA,,,PRISMA(5111623)Cochrane,12..,.,,,.(Sudy}cvel)().,.(outcomeleve3,,,,,}3,([,1,,2}9PRISMA:DougAltman,DSe,CentreforStatistiesinMedicine(Oxford,UK);GerdAntes,PhD,universityHospitalFreiburg(Freiburg,Germany):DavidAtkins,MD,MpH.HealthServieesResearehandDeveloPmentServiee,VeteransHealthAdministration(washington,n.C.,US);virgi-niaBarbour.MRCp,DPhil,pLoSdieine(Cambridge.UK);NiekBarrowman,Phn,ehildren5HosPitalofEasternOntario(Ottawa,Canada);JesseA.Berlin,SeD,Johnson&JohnsonPharmaeeutiealResearehandDeveloPment(Titusville,NewJersey.US):JoealynClark.phD,PLOSMedeine(atthetimeofwriting,B,London,UK);MikeClarke,PhD.UKCoehraneCentre(Oxford,UK)andsehoolofNursingandMidwifery,TrinityCollege(Dublin,lreland);DeborahCook,MD,DePartmentsofMedieine,CliniealEPidemiologyandBiostatisties,MeMasterUniversity(Hamilton,Canada);RobertoDAmieo,PhD,UniversitddiModenaeReggioEmilia(Modena,Italy)andCentroCoehrancItaliano,IstitutoRieereheFarmaeologieheMarioNegri(Milan,Italy):JonathanJ.Deeks,phD,UniversityofBirmingham(Birmingham,UK);P.2.oevereaux,Mn,PhD,DePartmentsofMedieine,CliniealEPidemiologyandBiostatisties,MeMasteruniversity(Hamilton,Canada);KayDiekersin,PhD,JohnsHoPkinsBloombergSehoolofPublieHealth(Baltimore,Maryland,US):MatthiasEgger,MD,DePartmentofSoeialandPreventiveMedieine,UniversityofBern(Bern,switzerland);EdzardErnst,MD,PhD,FRCP,FRCP(Edin),PeninsulaMediealSehool(Exeter,UK);PeterC.Gtzsehe,MD,MSe,TheNordiCCoehrancCentre(Copenhagen.nenmark):JeremyGrimshaw,MBChB,PhD,FRCFP,OttawaHosPitalResearehInstitute(Ottawa,Canada):GordonGuyatt,MD,DePartmentsofMedieine,CliniealEPidemiologyandBiosratisties,MeMastefUniversity(Hamflton.Canad);JulianHiggins,phD,MRCBiostatistiesUnit(Cambridge,UK):Johnp.A.Ioannidis,MD,UniversityofIoanninaCamPus(loannina.Greeee);JosKleijnen,MD,phD,KleijnenSystematieReviewsLtd(York,UK)andSehoolforpublie