Investigations

1st investigations to order

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Adolescent and pre-adolescent depressive disorders are clinical diagnoses, based on a comprehensive diagnostic evaluation of history and presenting symptoms. It is crucial to make an accurate diagnosis, with input from multiple sources including, but not limited to, the child, parents, and school (teachers, counsellors).

Result

fulfils diagnostic criteria

Investigations to consider

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Baseline assessment to exclude thyroid dysfunction.

Primary hypothyroidism: elevated TSH; free T4 may be low.

Hyperthyroidism: suppressed TSH; elevated free T4.

Result

normal; excludes thyroid dysfunction

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Result
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Baseline assessment to exclude anaemia or other disorders.

Infectious mononucleosis: may show anaemia, reticulocytosis, lymphocytosis, atypical lymphocytes.

Iron deficiency: microcytic, hypochromic anaemia; low reticulocyte count.

Hypothyroidism: occasionally mild anaemia; macrocytosis.

Vitamin B12 deficiency: elevated mean corpuscular volume, low haematocrit.

Result

normal

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Baseline assessment test.

Result

negative or positive for substance

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Screen for pregnancy in females should also be completed.

Result

variable

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Helpful in excluding medical causes of depression. With increasing rates of juvenile obesity, which in itself can be comorbid with depression, there is an increase of micronutrient deficiency.

Result

normal

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Result
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Helpful in excluding medical causes of depression. With increasing rates of juvenile obesity, which in itself can be comorbid with depression, there is an increase of micronutrient deficiency.

Result

normal

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