At what age range is bipolar disorder most commonly diagnosed?

Bipolar disorder is most commonly diagnosed in individuals aged 15 to 40 years. This age range aligns with the typical onset period for many mood disorders, where individuals begin to experience significant mood changes, often in their late teens to early adulthood. During this time, life stressors and biological changes can trigger the onset of symptoms such as manic and depressive episodes.

The pattern of diagnosis reflects the developmental stage of adolescents transitioning into adulthood when they may confront significant life changes and challenges that can exacerbate mental health issues. Early identification and treatment are crucial for managing bipolar disorder effectively, as it can lead to improved outcomes when addressed promptly.

In contrast, the other age ranges are less associated with the primary onset of bipolar disorder. The younger age range of 5 to 15 years generally includes childhood disorders that are distinct from bipolar disorder. Diagnoses in the later ages of 40 to 60 years and above 60 years are often more indicative of a later-life onset or other psychiatric conditions rather than the primary manifestation of bipolar disorder.