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

nalt:137077
  skos:prefLabel "estudios de observación"@es, "observational studies"@en ;
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  skos:narrower nalt:341427 .

nalt:341427_def
  rdf:value "Estudios observacionales en los que los datos se analizan en el ámbito poblacional o grupal, en lugar de hacerlo en el plano individual. Se suelen llevar a cabo para medir factores de riesgo, la prevalencia y la incidencia de una enfermedad en una población."@es, "An ecological study is an observational study in which data is analysed at the population or group level rather than at an individual level. These studies are often conducted to measure risk factors, prevalence and incidence of a disease at a population level."@en ;
  dc:source "NAL Thesaurus Staff" ;
  a <https://lod.nal.usda.gov/naltv#Definition> .

<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:341427 .

nalt:341427
  skos:broader nalt:37565, nalt:137077 ;
  skos:altLabel "ecologic studies"@en ;
  skos:hiddenLabel "ecologic study"@en, "ecological study"@en ;
  skos:definition nalt:341427_def ;
  skos:prefLabel "estudios ecológicos"@es, "ecological studies"@en ;
  ns0:marc001 "95694" ;
  a skos:Concept, ns0:Topic ;
  dc:created "2020-07-16"^^xsd:date ;
  dc:modified "2020-10-29"^^xsd:date ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> .

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