Which diagnostic feature characterizes Bipolar I Disorder?

Which diagnostic feature characterizes Bipolar I Disorder?

• A. Bipolar II Disorder: Diagnostic Features
• B. Cyclothymic Disorder: Diagnostic Features
• C. Bipolar I Disorder: Diagnostic Features
• D. Major Depressive Disorder: Diagnostic Features

Answer: (C)

Mania is the defining feature. In Bipolar I Disorder, the key is the occurrence of a manic episode—a distinct period of abnormally elevated, expansive, or irritable mood with increased energy that lasts at least one week (or any duration if hospitalization is required) and causes marked impairment or includes psychotic features or hospitalization. During mania, you typically see symptoms such as inflated self-esteem or grandiosity, decreased need for sleep, pressured speech, racing thoughts, distractibility, increased goal-directed activity, and risky behaviors. This level of impairment or need for hospitalization distinguishes Bipolar I from other mood disorders. Bipolar II involves hypomania (less severe, no major impairment) plus depressive episodes, cyclothymic disorder features chronic, milder mood fluctuations that don’t meet full mania or major depression criteria, and major depressive disorder lacks manic episodes entirely. Thus, the manic episode is the hallmark diagnostic feature of Bipolar I.

Mania is the defining feature. In Bipolar I Disorder, the key is the occurrence of a manic episode—a distinct period of abnormally elevated, expansive, or irritable mood with increased energy that lasts at least one week (or any duration if hospitalization is required) and causes marked impairment or includes psychotic features or hospitalization. During mania, you typically see symptoms such as inflated self-esteem or grandiosity, decreased need for sleep, pressured speech, racing thoughts, distractibility, increased goal-directed activity, and risky behaviors. This level of impairment or need for hospitalization distinguishes Bipolar I from other mood disorders. Bipolar II involves hypomania (less severe, no major impairment) plus depressive episodes, cyclothymic disorder features chronic, milder mood fluctuations that don’t meet full mania or major depression criteria, and major depressive disorder lacks manic episodes entirely. Thus, the manic episode is the hallmark diagnostic feature of Bipolar I.