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ADHD, predominantly inattentive — MCCQE Part 1 MCQ

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ModerateBehavioural ConcernsADHD, predominantly inattentiveMCCQE Part 1

A 14-year-old boy has persistent inattention, difficulty organising tasks, losing items, easily distracted since grade 1. Failing multiple subjects. No hyperactivity. Symptoms at school and home. Most likely diagnosis?

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Correct answer: D — ADHD, predominantly inattentive presentation

DSM-5 ADHD inattentive: >=6 inattention symptoms >=6 months, onset <12, >=2 settings. CADDRA: psychostimulants + behavioural interventions first-line. Often underdiagnosed, especially in girls.

Reference: CADDRA Canadian ADHD Guidelines