title: [Predictive value of Ages & Stages Questionnaires for cognitive performance at early years of schooling].
abstract: The Ages and Stages questionnaires (ASQ) has been recently validated in our country for developmental screening. The objective of this study is evaluate the validity of ASQ to predict low cognitive performance in the early years of schooling.
  
  
  METHODS
  Diagnostic test studies conducted on a sample of children of medium-high socioeconomic level were evaluated using ASQ at least once at 8, 18 and/or 30 months old, and later, between 6 and 9 years old, reevaluated using the Wechsler Intelligence Scale for Children-third edition (WISC-III). Each ASQ evaluation was recorded independently. WISC-III was standardized, considering underperformance when the total score were under -1 standard deviation.
  
  
  RESULTS
  123 children, corresponding to 174 ASQ assessments (42 of them were 8 months old, 55 were 18 months and 77 were 30 months of age) were included. An area under the ROC curve of 80.7% was obtained, showing higher values at 8 months (98.0%) compared to 18 and 30 months old (78.1 and 79.3%, respectively). Considering different ASQ scoring criteria, a low sensitivity (27.8 to 50.0%), but a high specificity (78.8 to 96.2%) were obtained; the positive predictive value ranged between 21 and 46%, while the negative value was 92.0-93.2%. Conclusion ASQ has low sensitivity but excellent specificity to predict a low cognitive performance during the first years of schooling, being a good alternative to monitor psychomotor development in children who attend the private sector healthcare in our country.
authors.affiliation: Servicio de Pediatría, Clínica Alemana, Facultad de Medicina, Universidad del Desarrollo, Santiago, Chile.
authors.forename: Luisa
authors.initials: L
authors.lastname: Schonhaut B
authors.affiliation: Servicio de Pediatría, Clínica Alemana, Facultad de Medicina, Universidad del Desarrollo, Santiago, Chile.
authors.forename: Marcela
authors.initials: M
authors.lastname: Pérez R
authors.affiliation: La Casa Azul, Centro Integral de Atención Psiquiátrica y Psicológica, Santiago, Chile.
authors.forename: Ana María
authors.initials: AM
authors.lastname: Castilla F
authors.affiliation: Servicio de Pediatría, Clínica Alemana, Facultad de Medicina, Universidad del Desarrollo, Santiago, Chile.
authors.forename: Sonia
authors.initials: S
authors.lastname: Castro M
authors.affiliation: Servicio de Pediatría, Clínica Alemana, Facultad de Medicina, Universidad del Desarrollo, Santiago, Chile.
authors.forename: Patricia
authors.initials: P
authors.lastname: Salinas A
authors.affiliation: Facultad de Psicología, Universidad Gabriela Mistral, Santiago, Chile.
authors.forename: Iván
authors.initials: I
authors.lastname: Armijo R
mesh_terms: D002648:Child; D002657:Child Development / Q000502:physiology; D002675:Child, Preschool; D003071:Cognition / Q000502:physiology*; D002658:Developmental Disabilities / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008403:Mass Screening / Q000379:methods; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires / Q000592:standards*