All three are seen in children. The clinical syndrome is seen equally among boys and girls. The frequency of depression increases with age. When other family members are depressed the incidence of depression in a children is higher. Clinical depression can be defined as an intense persistent state of unhappiness and misery that interferes with pleasure and or productivity.
Symptoms are similar for all age groups.
However, each individual may have a different combination of symptoms. Other possibilities Actively questioning young children will usually lead to diagnosis. Children can usually assess their own mood. Dr Bill's - Home Page.