@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ns0: <https://lod.nal.usda.gov/naltv#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

nalt:137083
  skos:prefLabel "estudios retrospectivos"@es, "retrospective studies"@en ;
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  skos:related nalt:137073 .

nalt:137077
  skos:prefLabel "estudios de observación"@es, "observational studies"@en ;
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  skos:related nalt:137073 .

<https://lod.nal.usda.gov/naltv#Topic>
  rdfs:label "Topic"@en ;
  a owl:Class .

nalt:37565
  skos:prefLabel "estudios epidemiológicos"@es, "epidemiological studies"@en ;
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  skos:narrower nalt:137073 .

nalt:137073
  skos:related nalt:137083, nalt:22778, nalt:137077 ;
  skos:altLabel "case control studies"@en, "case epidemiologic studies"@en, "case epidemiological studies"@en ;
  dc:created "2010-09-01"^^xsd:date ;
  skos:exactMatch <http://id.cabi.org/cabt/24635>, <http://id.agrisemantics.org/gacs/C18953> ;
  skos:hiddenLabel "case-control study"@en, "case epidemiologic study"@en, "case control study"@en, "case epidemiological study"@en, "case-control-studies"@en ;
  ns0:marc001 "58641" ;
  a ns0:Topic, skos:Concept ;
  skos:inScheme <https://lod.nal.usda.gov/nalt-core>, <https://lod.nal.usda.gov/nalt> ;
  dc:source "Joint Institute for Food Safety and Applied Nutrition (JIFSAN)" ;
  dc:modified "2018-12-03"^^xsd:date ;
  skos:broader nalt:37565 ;
  skos:prefLabel "estudios de caso y control"@es, "case-control studies"@en ;
  skos:closeMatch <http://id.loc.gov/authorities/subjects/sh2008007460> ;
  skos:definition nalt:137073_def .

nalt:22778
  skos:prefLabel "estudios de casos prácticos"@es, "case studies"@en ;
  a ns0:Topic, skos:Concept ;
  skos:related nalt:137073 .

nalt:137073_def
  rdf:value "Estudio epidemiológico en contraste con los de la enfermedad de interés (casos) que aquellos sin la enfermedad (controles). Los grupos se comparan con respecto al historial de exposición."@es, "An epidemiologic study contrasting those with the disease of interest (cases) to those without the disease (controls). The groups are then compared with respect to exposure history."@en ;
  dc:source "US Environmental Protection Agency" ;
  a ns0:Definition .

<https://lod.nal.usda.gov/nalt>
  rdfs:label "NALT Full"@en ;
  a skos:ConceptScheme .