The impact of study design and diagnostic approach in a large multi-centre ADHD study. Part 1: ADHD symptom patterns.

BMC Psychiatry · 2011 · PMC3082291 · PMID 21473745

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highly significantp < .001actually significant

In addition, there were highly significant centre effects on inattentive symptoms (Q = 88.37, p < .001), hyperactive/impulsive symptoms (Q = 93.53, p < .001), and a significant gender by centre effect for the number of inattention symptoms (Q = 103.8, p < .001) but not for the number of hyperactive/impulsive symptoms.

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