title: [Risk factors in school learning difficulties in children of medium and low socioeconomic levels].
mesh_terms: D000124:Achievement; D001077:Aptitude Tests; D002648:Child; D005190:Family; D005260:Female; D006801:Humans; D007859:Learning Disabilities / Q000209:etiology*; D008297:Male; D011446:Prospective Studies; D012306:Risk; D012959:Socioeconomic Factors; D013332:Student Dropouts
vernacular_title: Factores de riesgo en las dificultades de aprendizaje escolar en niños de medio económico-social medio y bajo.