<prompt> According to the ICD-10 revision, for establishing a diagnosis of mania, the symptoms should persist for at least:1 week2 weeks3 weeks4 weeks  <response>: Ans. a. 1 week Ref: Niraj Alhuja 6e p75- 76According to the ICD-10 revision, for establishing a diagnosis of mania, the symptoms should persist for at least 1 week.Diagnostic Criteria of Manic EpisodeAbnormality and persistently elevated, irritable or expensive mood for 1 weekQ or need hospitalization3 of these hyperactivities:Decreased need of sleepsIncrease in goal orientated activityQ social, spiritual, sexual, religiousExcessive involvement in pleasurable activitiesQ unrestrained buying sprees, foolish business investments, donations or sexual indiscretion that have a higher potential for painful consequencesMore talkative or pressure to keep talkingQInflated self esteem or grandiosityQDistractibilityQFlight of ideas or racing thoughtsQ 