title: Do sluggish cognitive tempo symptoms predict response to methylphenidate in patients with attention-deficit/hyperactivity disorder-inattentive type?
abstract: In this naturalistic study, we assessed the effect of sluggish cognitive tempo (SCT) symptoms in the response to methylphenidate (MPH) in 88 children and adolescents with attention-deficit/hyperactivity disorder-Inattentive Type (ADHD-I) according to Diagnostic and Statistical Manual of Mental Disorders, 4(th) edition (DSM-IV) criteria. SCT symptoms were assessed in these subjects by means of the Child Behavior Checklist (CBCL) scale. The response to MPH after 1 month of treatment was assessed by parental scores in the Swanson, Nolan, and Pelham Questionnaire-Version IV (SNAP-IV) scale. No significant differences were found between subjects with and without SCT symptoms in the response to MPH either assessing presence of SCT symptoms categorically (at least 1 symptom) or dimensionally (p < 0.5 for both analyses; effect size [ES] = 0.24). Our findings corroborate previous phenotypic data suggesting that SCT symptoms do not define a clinically relevant type of ADHD-I.
authors.affiliation: ADHD Outpatient Program, Division of Child Psychiatry, Hospital de Clinicas de Porto Alegre, Federal University of Rio Grande do Sul , Porto Alegre, Brazil .
authors.forename: Henrique T
authors.initials: HT
authors.lastname: Ludwig
authors.forename: Breno
authors.initials: B
authors.lastname: Matte
authors.forename: Betina
authors.initials: B
authors.lastname: Katz
authors.forename: Luis Augusto
authors.initials: LA
authors.lastname: Rohde
mesh_terms: D000293:Adolescent; D001288:Attention; D001289:Attention Deficit Disorder with Hyperactivity / Q000150:complications / Q000188:drug therapy* / Q000523:psychology*; D002648:Child; D002675:Child, Preschool; D003072:Cognition Disorders / Q000150:complications / Q000188:drug therapy* / Q000523:psychology*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008774:Methylphenidate / Q000627:therapeutic use*; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D008774:Methylphenidate