Children's Relative Age and ADHD Medication Use : A Finnish Population-Based Study

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dc.contributor.author Vuori, Miika
dc.contributor.author Martikainen, Jaana E.
dc.contributor.author Koski-Pirilä, Anna
dc.contributor.author Sourander, Andre
dc.contributor.author Puustjärvi, Anita
dc.contributor.author Aronen, Eeva T.
dc.contributor.author Chudal, Roshan
dc.contributor.author Saastamoinen, Leena K.
dc.date.accessioned 2021-02-01T12:06:01Z
dc.date.available 2021-02-01T12:06:01Z
dc.date.issued 2020-10
dc.identifier.citation Vuori , M , Martikainen , J E , Koski-Pirilä , A , Sourander , A , Puustjärvi , A , Aronen , E T , Chudal , R & Saastamoinen , L K 2020 , ' Children's Relative Age and ADHD Medication Use : A Finnish Population-Based Study ' , Pediatrics (English Edition) , vol. 146 , no. 4 , 20194046 . https://doi.org/10.1542/peds.2019-4046
dc.identifier.other PURE: 156579719
dc.identifier.other PURE UUID: a90d1e14-79f2-4157-8bc5-3de5787418f3
dc.identifier.other WOS: 000581680200067
dc.identifier.other Scopus: 85092681015
dc.identifier.uri http://hdl.handle.net/10138/325606
dc.description.abstract Using population-based register data, we examine the association between children's birth month and ADHD medication use in a single jurisdiction (Finland). OBJECTIVES: The youngest children in a classroom are at increased risk of being medicated for attention-deficit/hyperactivity disorder (ADHD). We examined the association between children's birth month and ADHD medication rates in Finland. METHODS: Using a population-based study, we analyzed ADHD medication use among children born in 2005 to 2007. Cases (n= 7054) were identified from the first purchase of medication for ADHD. Cox proportional hazard models and hazard ratios (HRs) were examined by birth month and sex. Finnish children start first grade in the year of their seventh birthday. The cutoff date is December 31. RESULTS: Risk of ADHD medication use increased throughout the year by birth month (ie, January through April to May through August to September through December). Among boys born in September to December, the association remained stable across cohorts (HR: 1.3; 95% confidence interval [CI]: 1.1-1.5). Among girls born in September to December, the HR in the 2005 cohort was 1.4 (95% CI: 1.1-1.8), whereas in the 2007 cohort it was 1.7 (95% CI: 1.3-2.2). In a restricted follow-up, which ended at the end of the year of the children's eighth birthday, the HRs for boys and girls born in September to December 2007 were 1.5 (95% CI: 1.3-1.7) and 2.0 (95% CI: 1.5-2.8), respectively. CONCLUSIONS: Relative immaturity increases the likelihood of ADHD medication use in Finland. The association was more pronounced during the first school years. Increased awareness of this association is needed among clinicians and teachers. en
dc.format.extent 9
dc.language.iso eng
dc.relation.ispartof Pediatrics (English Edition)
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject ATTENTION-DEFICIT/HYPERACTIVITY DISORDER
dc.subject DIAGNOSIS
dc.subject IMMATURITY
dc.subject STANDARDS
dc.subject 3123 Gynaecology and paediatrics
dc.title Children's Relative Age and ADHD Medication Use : A Finnish Population-Based Study en
dc.type Article
dc.contributor.organization HUS Children and Adolescents
dc.contributor.organization Clinicum
dc.contributor.organization Children's Hospital
dc.contributor.organization University of Helsinki
dc.contributor.organization Helsinki University Hospital Area
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1542/peds.2019-4046
dc.relation.issn 0031-4005
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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