@prefix n9j: <http://data.loterre.fr/ark:/67375/N9J> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

n9j:-XJL2X39V-C
  owl:sameAs <https://concepts.sagepub.com/social-science/concept/stratified_methods> ;
  skos:definition "Confounding is a major consideration in etiological investigation because it can result in biased estimation of exposure effects. Control of confounding in data analysis is achieved by stratified analysis or by multivariable analysis. [Source: Encyclopedia of Epidemiology; Stratified Methods]"@en ;
  a skos:Concept ;
  skos:inScheme n9j: ;
  skos:broader n9j:-C8NQZ4GL-J ;
  skos:prefLabel "stratified methods"@en .

n9j:-methods
  a isothes:ConceptGroup ;
  skos:prefLabel "methods"@en ;
  skos:member n9j:-XJL2X39V-C .

n9j:-C8NQZ4GL-J
  skos:prefLabel "statistics and research methods"@en ;
  a skos:Concept ;
  skos:narrower n9j:-XJL2X39V-C .

n9j: a skos:ConceptScheme .