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1、ßTheAuthor2006.PublishedbyOxfordUniversityPressinassociationwithTheLondonSchoolofHygieneandTropicalMedicine.Allrightsreserved.doi:10.1093/heapol/czl029AdvanceAccesspublication9October2006Howtodo(ornottodo)...Constructingsocio-economicstatusindices:howtousep
2、rincipalcomponentsanalysisSEEMAVYASANDLILANIKUMARANAYAKEHIVToolsResearchGroup,HealthPolicyUnit,DepartmentofPublicHealthandPolicy,LondonSchoolofHygieneandTropicalMedicine,London,UKTheoretically,measuresofhouseholdwealthcanbereflectedbyincome,consumptionorexp
3、enditureinformation.However,thecollectionofaccurateincomeandconsumptiondatarequiresextensiveresourcesforhouseholdsurveys.Giventheincreasinglyroutineapplicationofprincipalcomponentsanalysis(PCA)usingassetdataincreatingsocio-economicstatus(SES)indices,werevie
4、whowPCA-basedindicesareconstructed,howtheycanbeused,andtheirvalidityandlimitations.Specifically,Downloadedfromissuesrelatedtochoiceofvariables,datapreparationandproblemssuchasdataclusteringareaddressed.Interpretationofresultsandmethodsofclassifyinghousehold
5、sintoSESgroupsarealsodiscussed.PCAhasbeenvalidatedasamethodtodescribeSESdifferentiationwithinapopulation.IssuesrelatedtotheunderlyingdatawillaffectPCAandthisshouldbeconsideredwhengeneratingandinterpretingresults.http://heapol.oxfordjournals.org/Keywords:soc
6、io-economicstatus,principalcomponentsanalysis,clusteranalysis,methodology1.Introductionmeasuringhouseholdincomeorexpenditureinlow-andmiddle-incomecountrysettings,othermethodsofCommontohealthresearchandpolicyinterventionsisdevelopingSESindicesarebeingusedwhi
7、chstreamlinetheconcernthatthereisadifferentialimpactwithrespectbyguestonNovember5,2012thevariablesrequired,enablingdatatobecollectedtohealthoutcomesorhealthserviceutilizationbasedonmorerapidly.Ratherthanincomeorexpenditure,datasocio-economicstatus(SES)(Deat
8、on2003;Schellenbergarecollectedforvariablesthatcapturelivingstandards,etal.2003).Thus,informationabouthowhouseholdssuchashouseholdownershipofdurableassets(e.g.TV,varybySES,andtheextenttowhichthisrelate
