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

n9j:-methods
  a isothes:ConceptGroup ;
  skos:prefLabel "methods"@en ;
  skos:member n9j:-L5QFL68H-X .

n9j:-D78NZ9RV-8
  skos:prefLabel "prospective studies"@en ;
  a skos:Concept ;
  skos:broader n9j:-L5QFL68H-X .

n9j:-QX3KKF8K-0
  skos:prefLabel "retrospective studies"@en ;
  a skos:Concept ;
  skos:broader n9j:-L5QFL68H-X .

n9j: a skos:ConceptScheme .
n9j:-KLLV05Z8-X
  skos:prefLabel "follow-up studies"@en ;
  a skos:Concept ;
  skos:broader n9j:-L5QFL68H-X .

n9j:-VDKPP04S-0
  skos:prefLabel "epidemiologic studies"@en ;
  a skos:Concept ;
  skos:narrower n9j:-L5QFL68H-X .

n9j:-QDRGDHD3-9
  skos:prefLabel "cohort-sequential design"@en ;
  a skos:Concept ;
  skos:broader n9j:-L5QFL68H-X .

n9j:-JJPC7C6W-4
  skos:prefLabel "attrition"@en ;
  a skos:Concept ;
  skos:broader n9j:-L5QFL68H-X .

n9j:-XZ499VXQ-K
  skos:prefLabel "longitudinal studies"@en ;
  a skos:Concept ;
  skos:broader n9j:-L5QFL68H-X .

n9j:-L5QFL68H-X
  skos:prefLabel "cohort studies"@en ;
  skos:inScheme n9j: ;
  skos:narrower n9j:-KLLV05Z8-X, n9j:-XZ499VXQ-K, n9j:-D78NZ9RV-8, n9j:-QDRGDHD3-9, n9j:-QX3KKF8K-0, n9j:-JJPC7C6W-4 ;
  owl:sameAs <https://concepts.sagepub.com/social-science/concept/cohort_studies> ;
  a skos:Concept ;
  skos:definition "Cohort studies represent a type of epidemiological approach to investigating the incidence and prevalence of disease across a fixed population group over time. Using this type of approach, researchers compare outcomes between a cohort, or group, of individuals who have a risk factor (e.g., smoking) believed to be associated with a disease (e.g., lung cancer) and a group without the factor (e.g., non-smokers). [Source: Encyclopedia of Health Services Research; Cohort Studies]"@en ;
  skos:broader n9j:-VDKPP04S-0 ;
  skos:exactMatch <https://id.nlm.nih.gov/mesh/D015331.html> .