The objective of the ambispective cohort study is to describe clinical management and clinical outcomes related to bipolar disorder in China, and establish the factors associated with different management patterns and clinical outcomes, provide psychiatrists with reliable and up-to-date information on the disease.

Inclusion Criteria:

• Provision of subject informed consent.
• Diagnosis of Bipolar Disorder I or II (DSM-IV TR) in any phase of the disorder.
• Patients who had at least one mood event( depression, mania, hypomania or mixed) according to DSM-IV TR definition during the 3 and 12 months prior to the beginning of the study.

Exclusion Criteria:

• Inability to complete Patient Reported Outcomes (PROs) questionnaires.
• Participation in an interventional clinical study in last 12 months.

Patients diagnosed with bipolar disorder I or II with at least one mood event during the 3 and 12 months prior to the beginning of the study.