There are nine symptoms listed in the Diagnostic and Statistical Manual IV (DSMIV) [11] for depressive disorder namely, sleep disturbance, interest/pleasure reduction, guilt feelings or thoughts of worthlessness, energy changes/fatigue, concentration/attention impairment, appetite/weight changes, psychomotor disturbances, suicidal thoughts and depressed mood.For diagnosis of major depression, five of the nine must be present for at least two weeks and one of those five must be loss of interest or pleasure or depressed mood [4].
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Baba Awoye Issa (2013) studied this question.
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