Which of the following statements concerning bipolar disorder is not correct?

Bipolar disorder most commonly begins in late adolescence or early adulthood, rather than before adolescence. Although it can occur in children, onset before adolescence is not common, so the statement that it commonly starts before then is not correct. The other statements describe recognized features: bipolar disorder occurs at similar rates in females and males, rapid cycling involves at least four mood episodes in a year, and mania can involve increased feelings of productivity or creativity.

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