Comparing characteristics of mania across groups, bipolar I groups 3 and 4 individuals, not surprisingly, received treatment significantly more often during their manic episodes, were more often hospitalized and had a higher number of symptoms during their most severe episode compared to bipolar II groups 1 or 2 subjects. While there was no difference between groups 2 and 4 in number of symptoms during their most severe depressive episode, individuals of these two groups had significantly more symptoms than group 1 members. No differences were found for ages at onset of mania or depression and rates of subjects receiving medication or electroconvulsive therapy (ECT) in both mania and depression episodes across groups.
