volume 146, issue 4, Pe20194046 2020
DOI: 10.1542/peds.2019-4046
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Miika Vuori, Jaana E. Martikainen, Anna Koski-Pirilä, Andre Sourander, Anita Puustjärvi, Eeva T. Aronen, Roshan Chudal, Leena K. Saastamoinen

Abstract: 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 …

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