Objective: To examine screening efficiency for preschool psychopathology by comparing the Strengths and Difficulties Questionnaire against diagnostic information, and to determine the added value of impact scores and teacher information.Method: Using a two-phase sampling design a population-based sample of 845 4-year-olds was recruited from community health check-ups in Trondheim, Norway; screen score stratified and oversampled for high screening scores. Blinded to screen ratings, DSM-IV diagnoses were assigned using the Preschool Age Psychiatric Assessment interview, against which the Strengths and Difficulties Questionnaire scores were compared through Receiver Operating Characteristics analysis.Results: Emotional and behavioral disorders were identified through parent ratings with a specificity of 88.8% (87.0-90.6%) and a sensitivity of 65.1% (51.6-78.6%). The negative predictive value was 97.9% (96.8-98.9%), whereas the positive predictive value was 24.2% (18.0-30.3%) at a prevalence of 5.2%. Parental ratings identified more behavioral disorders (79.3%) than emotional disorders (59.2%). Screening for any disorder was somewhat less efficient; specificity 88.9% (87.0-90.7%), sensitivity 54.2% (41.8-66.6%), negative predictive value 96.4% (95.0-97.8%) and positive predictive value 25.9% (19.6-32.2%) at a prevalence of 6.7%. The AUC value was 0.83 (0.76-0.90) for emotional and behavioral disorders and 0.76 (0.68-0.83) for any disorder. The prediction accuracy was not improved by impact scores or teacher information.
Conclusions:The results indicate that preschoolers' emotional and behavioral disorders can be screened with the same efficiency as in older children and adults. Other disorders were identified to a lesser extent. Further research should explore the potential of preschool screening to improve early detection and subsequent intervention.