The number of adults with bipolar disorder is estimated to be anywhere from 2.6% to 3.9% of adults in the United States. Given that there are many who are not diagnosed, the proportion is certainly higher.
The average age when bipolar disorder appears is 25, but all ages from 18-59 are common, and it's even possible for the first symptoms to occur at age 60 or older.
Fifty to 55% of patients are female, which is a statistical difference too close to call, and I found a report that said dia...
